Even if I owned a PS3 or an XBox360, I wouldn't be buying this. Reasons why:
I still have my Dreamcast with Smash Pack Vol. 1 (where is Volume 2 SEGA?)
I have both Smash Pack Vol. 1 and 2 for PC.
I have Sega Genesis Collection on PS2, which the emulation sucked (middle finger at Digital Eclipse).
I have tons of ROMS and emulators.
and namely, I have at least 3 Genesis systems, and buy carts for it still.
Furthermore, while this doesn't apply to XBox360 obviously, but doesn't the PS3 upscale PS2 games? Now explain to me how a few extra games is going to make a difference between the PS2 collection and the PS3 version? Wow, 1080p...let me just jump for joy for graphics being upscaled from 320 x 224 to 1920x1080. I think the jump from the original res to 480i was fine, but 1080p, that's a bit overkill.
Also, where are the rare titles? Where are the games that really showed what the system could do, not just this popular crap...? Would it really hurt them to put every single game that they have the rights to, on one release? One volume crap of rehashing the same titles over and over again, gets a bit old. How about more Japanese titles that are actually better than Golden Axe III?! I mean I like Golden Axe III, but the general consensus that I have heard from most people is that they hated the game.