Its an action/adventure game , so it doesnt needs 60fps ... IMO 60fps is only good for FPSs ... you know , like the game that we Sony fans are forbidden to talk about ( I give you a tip : its on the 360 and it sold a LOT ) .

For "slower" games (i.e. non racing, flight sims, fighters, etc..) 30fps is fine. You really notice it on fast moving games though.

I personally prefer 1080i over 780p - but this could be a preference thing. In many ways, I think 576i looks better than 480p as well - but you lose just a little too much texture. 720p has a lot of scanlines, but 1080i will have less jaggies (and less clear textures).

Nicely done Naughty Dog - not having 1080i support would bite.

(pity though - you wonder what the game would look like at 60fps, running 1080p!)