GamePro had an interview with Sony's executive Phil Harrison about the PlayStation 3.
GP: We were intrigued to see how many games have 1080p support, and to hear focus so much on talking about 1080p. Is that a real commitment from Sony to 1080p for the future?
PH: The PlayStation 3 is the only format that can do full HD, true HD. So it's obviously to our advantage to take advantage of that...where appropriate. And it doesn't require that every game be 1080p, because I think that some games actually look better at 720p depending on the style of the game, depending on the pixel rendering or pixel shading that's been adopted..