Gandos: Right! Though I'm not tech-savvy enough myself to make any guesses, the most realistic theory I've seen goes something along the lines of what you mentioned at the end. The idea being that the chip would essentially have two settings: normally clocked when docked and running at 1080p on a television, downclocked when portable and running at 540p on the handheld screen (that being the most realistic resolution for a portable that also scales nicely to 1080p).
ET3D: There's no point in a resolution that's exactly divisible. Game developers have a lot of experience targeting varied resolutions. 720p or 1280x800 make more sense to me, being common tablet screen resolutions where games and text look decent enough. 720p has less than half the number of pixels compared to 1080p, so is good enough for a performance boost.
Hmmm, that's a valid point. There's also the screen size to consider. Not that screen resolution is necessarily at all related to screen size. But if they are going with a tablet-sized screen, 720p does make more sense. And they'd probably want the screen to be tablet-sized if they are indeed going with this hybrid concept:
- the detachable controllers would need to be reasonably sized in order to be used independently. But if the screen was small, that would be impossible or at least awkward/impractical from a design perspective.
- if their intention with the detachable controllers is to allow for multiplayer action on the go as well as on the TV (kind of like how the Eurogamer concept suggests), the portable screen would have to be of decent size to actually make that practical.
The only concern is whether they'd manage to get a decent battery life out of the device when used independently. Even if the chip is downclocked, 720p gaming is likely to be a significant drain.