GIF's are lossless so they only look horrible if the orig is horrible or you use them improperly (i.e. advanced colors).  And the point has already been made that they're not implementing stuff or taking it away (i.e. japanese audio options) because they're being lazy/inefficient.  Besides that, uncompressed files have other disadvantages like taking longer to access, etc.

Just because you can doesn't mean you should, that attitude of "why not do it" is such a wasteful style of thinking and you can tell from how much junk people have lying around in their house. 

I think the two biggest culprits would be sound (all language tracks on one disc, a HUGE advantage of the Blu-Ray) and probably putting the full game on the disc two times to make for a seamless experience without having to resort to the "installation" issues that other Ps3 games have.

I doubt there is actually 50GB worth of pure game on this disc, so don't go thinking like that. Can you imagine....Oblivion and expansions were only like 7-8GB....that would be a HUGE game.

@ Lone_Canus_Lupus, print of the full game twice on a disc allows the machine to read from the exact same data two times in one disc rotation.
I'm sure it requires a little programming to pull of to the maximum extent, but it is the equivalent of cutting the disc read time in (about) 1/2.

GIF's are a non-lossy format, so, well, you're wrong. :p It's a format that's best used for images with lots of repeated parts since those compress well with the LZW compression scheme. PNG is a similar format, but can do 24 bit color, as opposed to GIF's 8 bit color. Perhaps that's what you're thinking of?

If you had said JPEG, well, then we could have agreed with you since JPEG is a lossy format (like MP3) and achieves compression by throwing away data and approximating the output.

EDIT: Whoops, darconi beat me to it...

From Kojima (Acoording to a fan who meet him at Comi-con):

MGS4 will be 1080. I'm assuming 1080p, but he said 1080. He said Sony is "forcing" them to do it in 1080. He hesitated when he said this. Im thinking he could not find the right word, and chose to say "forcing."

No way it will fit on a DVD9. Wouldn't give me a number as how big the game will be. But went on about how Sony is pushing HD content and in no way will it be possible to fit it on a normal DVD, and BD is totally necessary for MGS4.

Edit: Probaly the original site (Where I read it) twisted and add the "fit into a dvd" part, but the issue is there, Kojima was pushed to put a lot of HD content (prerendered cuts) in the game, this way, it cannot fit into a dvd...

PR strategy anyone??? 

the 100gb disc could be possible, as in some wii games, konami can put the update in the disc, if possible to enable 100gb.

neways, should be a great game if it takes up all the room in the blu-ray disc

 Why would the exact same data need to be read twice? Unless you're taking up all the RAM at once...I doubt you'll really need to read the exact same thing more than once.

I think it was Shams who once explained why not compressing is stupid unless your doing it deliberately for a marketing gimmick.

If you have gb upon gb floating around it uses up server space, requires additional personnel just to manage files, costs bandwidth if your developing on more than one site (hell, on more than one computer) and generally eats up performance due to basic file transfer and manipulation.

In other words, there is only one possible reason why MGS4 is more than twice the size of any other PS3 exclusive games (in themselves often artificially size-inflated for marketing (Motorstorm 22gb *cough*, Killzone 2 level 2gb *cough*)) and that is the PR value.

Thanks for playing.

 Well with my experience in Photoshop, the GIF files can only do 256 colors, total crap, while with JPEG you can set the quality by choosing what kind of file size you are looking for, and when set to max, there's hardly any difference between that and the original 24bit bmp file.

But I guess thats just Photoshop. 

 Errrr, 24 bits > 8 bits, thats compresion, 8 bits gif takes 1/3 of the space (removing colors) of a normal 24 bits image...