MGS4 had plenty of faults but I have to admit I was blown away by many of the sequences.
I must have played each Metal Gear Solid 2-3 times at least and MGS4 was no different.
The whole Xbox thing is quite humorous. If you think nothing would be compromised then you are incredibly naive.
Uncompressed Audio, Uncompressed textures were only available because of the Blu-Ray. Slower read times lead to the installs, which are a pain. But in all honesty, make a cup of tea and its done.
All other Metal Gears have come to other consoles, its never been an exclusive series. But for some reason, MGS4 I can't see it happening. The PS3 is too different, something programmed from the ground up to take advantage of the cell is not going to be easy to adapt.
I think you are completely wrong. If anything the 360 one will be slightly better. They will add some kind of content to give it added value to get people like myself who already have it on PS3 to buy again.
Compressed audio etc is not a problem. If you can think you can tell the difference between a decent mp3 and a CD then you are having a laugh.
Whether or not it is real, is questionable but from a financial stand point it makes sense and it is not without precedent for MGS.