"I've been doing a lot of interviews and stage shows," said Kojima to Eurogamer. "And half the questions are like: Will MGS4 be coming out on 360 or other formats?" Kojima reiterated to the publication that MGS4 will remain a PS3 exclusive because 1) he believed that MGS's success entwined with PlayStation and 2) MGS4 was optimized for the PS3 and wouldn't be possible with other hardware.
Hopefully, this will bring an end to platform questions and, as Kojima puts it, will make people focus more on and appreciate the game itself rather than deliberating over what platform it's on. But of course, we're preaching to the choir here ... pass this bit of news onto a fellow non-PS3 gamer and help ease Kojima's suffering, okay?