You only need to play 1 game on PS3 to realize it is inferior to a PC. The graphics alone do not even slightly contend with PC. Every game you play has no AA so it feels like you're playing a low resolution, even on a huge HDTV.
If you were to combine a bunch of PS3s together, isn't that just, building a computer? You're stuck with a PS3 being what it is, until a "PS4". This is why I have a PS3 and a PC. I enjoy several games that come out on PS3 simply because they are not on PC or are more popular on console, GTA4.. prime example.