the dvd player on the ps2 is of pretty shitty quality. You can be damn sure they threw in a cheap version of a blue-ray player into their console.
PS3's game lineup is pretty unimpressive at this point, with the longevity of most games not lasting long because there really isn't a multiplayer community. The PS3 has done jack shit so far in the competition and their sales are lagging way behind the other two companies.
Madden, NBA, and NHL all have huge audiences on the 360 and are pretty competitive at that. HD-enabled, hard drive, and no lag makes a big difference imo for sports gamers. Graphics are really beautiful on 1080 also.