From the beginning of time, Xbox 360 and PS3 gamers have been dueling about who's console is the more graphically powerful. In these skirmishes, terms like CPU, GPU, and RAM have been thrown around, but now those folks on the PS3 side of the fray have another weapon in their arsenal: disc format.
its already started as RAGE have highlighted,but all machines show there age after time look at certain ps2 games its evolution, sony just thought ahead if microsoft had done the same and included hd-dvd as standard in all honestly i believe with the headstart the 360 had bluray would have failed and ps3 would have struggled alot worse, but as it is now ps3 has the most potential which slowly but surely is becoming evident
I think that the xbox will be headed for mandatory installs.
Especially with the larger hard drive model and the new feature in the fall update.