While some are just receiving their mobile gaming capabilities, others are running Rage at 60fps. That is precisely what John Carmack from id Software (hint: DooM 1, 2 and 3; Quake 1, 2, 3 and 4) demoed with an iPhone 4 in his hands at QuakeCon 2010. Carmack was using id's Tech 5 graphics engine, and, scaled for the iPhone, the “megatexture” experience of Rage looked amazingly smooth. He even went as far as to say that the demo is able to "kill anything done on the Xbox or PlayStation 2... ". Certainly an impressive feat, if we forget that the whole action is shown on a 3.5” screen, a big part of which is to be occupied by your thumbs.
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source: Engadget and Gizmodo