Sony is jumping on the 4k bandwagon as they demonstrated Gran Turismo in stunning 3840x2160 resolution.
Sadly the PS3 won't be able to run this as a standalone display. How sony arranged this was by linking four PS3 outputting 1920x1080@60 FPS. These outputs were then synchronized and shown on a 4K projector.
Theo Valich has more at his blog here.
Sony provided the SRX-S110 digital cinema projector, outputting resolution of 3840×2160, also known as "the 4K". In order to be able to show 4K resolution, Sony linked four PS3 consoles that provided four 1920×1080 images at 60fps each. Every console was in charge for 25% of the total screen resolution, providing breathtaking gaming experience.
I hope that this technology will be brought forward to the final version of the game. Judging by statements made by some Polyphony Digital representatives over the past year, we might not see GT5 in 2009, forcing us to wait until first half of 2010. By 2010, 4K will be a reality in a lot of Japanese homes, and PS3 will not be enough to capture hearts and minds of consumers that want 4K experience.