well i have a play station 1 and an xbox and i've played ps2 at a friends never tried ps3 but so far i'd have to say xbox is winning, can you put music on a ps3? cann you connect to xbox live on ps3? the answer to the first one might be yes, i am not sure but number 2 is a definate no and thats why xbox is beter.
You can still connect to Playstation network on a PS3!
But I think Wii is WAY better.