Everlong wrote:@NoDQ could you give a quick overview of what the difference is between 70mm and standard and what makes it so great? I honestly know nothing about it.
Sorry, I should have been more specific.
Basically, 70mm is the highest resolution film-gauge on the market. It vastly outweighs the standard (i.e., 35mm film) and also anything that is produced by digital equipment (i.e., a majority of films made today). Basically, it is the most vivid, clear, and absolutely gorgeous presentation of film out there.

Just look at the size differences between 35mm film and 70mm film. The larger the film strip, the more detail the camera can
capture. Resolution is off-the-walls in terms of clarity, and everything feels and looks so much more epic and vast.
Some of The Dark Knight was actually shot in the 70mm IMAX format, and here is a cool picture that illustrates the difference in terms of the sheer disparity between both formats:

While both film frames here capture the exact same image, the 70mm is higher in resolution, detail, and scope. This is obviously because it's larger (and of higher general celleuoid quality) than 35mm, and, as previously mentioned, has the capability to record more detail without losing resolution or becoming victim to compression. In saying that, IMAX 70mm is a bit different to widescreen 70mm, but the point still stands.
70mm films are extremely rare. In fact, there has only been around 20-40 films in the
history of motion pictures that have gone down this route. Some of the most notable examples are 2001: A Space Odyssey, The Master, It's a Mad, Mad, Mad, Mad World, Lawrence of Arabia, West Side Story, Patton, Hamlet (1996), etc.
The reason why they are so rare is because it is incredibly expensive. Purchasing 70mm film is a very costly and complicated process, and hiring professional film equipment that have the technical capacities to shoot with 70mm is something studios and financiers have no interest in pursuing, and you can probably see why, especially in an era of compressed digital projection.
Also, in a day and age where film is dying (both as a negative format and as distributional source) and the subsequent rise of digital, 70mm is unbelievably rare. Paul Thomas Anderson's The Master, which was released a few years back, was the first film to be shot on 70mm since Hamlet (1996), twelve years earlier. There were about 5000-10000 films made between those years that were shot on traditional 35mm or digital. That just goes to show.
Of course, to get the most out of a 70mm film, you need to watch it via. 70mm projection (i.e., a movie projector that is capable of projecting 70mm film as opposed to traditional 35mm). This is even rarer. I mean, totally rare. Australia, for example, only has one cinema left in the country that can do this. Then again, even seeing a 70mm film printed on a 35mm strip is still an amazing experience, even if much (about 50%) of its resolution is lost. Same if you see a 70mm film via. digital projection (whether it be 2 or 4K) or even at home on Blu-ray. It's far from the best, but either way, it rocks.
TLDR - To see Tarantino actually lobby to get The Hateful Eight shot in 70mm is remarkable. Price perhaps isn't that much of an issue heresince it is a large-scale project that has a lot of money, but it is the ultimate cinematic experience. Even today, the most advanced, expensive and top-of-the-line digital cameras don't even have HALF the resolution that 70mm does.
Look at something like The Hobbit. That was shot on high resolution digital (and the most recent at an ambitious 48fps), and it's an absolutely beautiful film, for sure, but put that next to The Master and eventually The Hateful Eight or any other 70mm film, and in pure technical terms, it is considerably inferior.
Of course, this is just about presentation.

What matters is if it is a good film or not, regardless of format, but a majority's of today's works are being shot digitally. 35mm, the negative format that used to be employed for just about every professional film ever made before 2004-2005, is slowly (and sadly) dying, despite the outreach from filmmakers like Tarantino or Nolan or Spielberg. To see Tarantino lobby for an ever rarer format, though, and actually get away with it is simply awesome.
Then again, none of us here will probably have the opportunity to see an actual 70mm print of The Hateful Eight. If you end up seeing it at the cinemas, it'll most likely be via. digital projection (hopefully 4K rather than 2K, which spawns better resolution, if you're lucky). A lot of its clarity and scope will be lost since it is utterly compressed, overall, but it will still be a very cinematic and epic experience.
Sorry for the long post. I'm geeking out a bit.

Here is another cool illustration:

On the left is traditional 35mm. On the right in 70mm. Just look at how much more range and depth you're getting when shooting with 70mm. And then imagine seeing that in cinemas, on a large screen with surround sound. You're capturing so much more 'action' and everything does not feel as... condensed. Tarantino will definitely utilise the advantages of 70mm when shooting - expect a lot of long, wide shots. Man, I can't wait. Also, I hope my post hasn't gave the implication that 35mm is some type of inferior format. I love that, too - in fact, 35mm still has higher resolution than most digital cameras today. Only the most recent 4K technology in digital can perhaps match the overall quality of 35mm. So yeah, no disrespect to 35mm. Perhaps most of everybody's favourite films here (including mine) were shot on that format.