Definitely will, especially uncharted. Killzone 1 was a rotting turd of a game, so I'll probably just rent 2 before making any purchase decisions, but I do understand that it looks phenomenal
I played Killzone when it came out and could not get myself to finish it, but Killzone 2... omg... the graphics are the best i've seen on a console yet (along with Uncharted 2) and it's a very fluid experience throughout. And also, the multiplayer is very good too... so if you like shooters then Killzone 2 is a no-brainer.