Has anyone said it looks like it's running on PS3? It's been said it looks like Uncharted on PS3 - I've said that myself. Compare them side by side and clearly UC4 is better, but it's not obviously better in a way that some of us instantly recognise when compared to our memory of UC on PS3. No-one ever said UC looked like something on PS2 because it was so much better. The suggestion UC4 looks similar to the PS3 version is, IMO, proof of diminishing returns. Other games like Infamous with is wet streets and neon lighting look more next-gen and wow than UC4 which isn't offering anything of considerable contrast to the former games.
This doesn't mean UC4 is a bad game. It doesn't mean ND are lousy coders. It doesn't mean UC should be changed into a neon-city setting! It's just a personal observation. People are allowed to share their personal disappointment just as much as their personal excitement.
Quite a few folk looked at the E3 trailer and reckoned the game wouldn't look that advanced. I think they're right - the game looks like playing UC3 in better quality rather than playing a CGI quality game. Heck, I guess I was one of them. IIRC I said 60 fps with a very controlled, limited cutscene could allow a far prettier aesthetic than would probably be achieved in game, althgh I'd have certainly held of making an assumption and waited to see. Which I'll still do; my comments are regards the current shown build, not the final game!