It would be rather amusing to be able to play current PC ("Microsoft exclusives") games on the PS3 using Linux and WINE. I doubt it's possible though.
If there is a problem enough people want to have solved, someone will solve it. But I think enough people who really want to play the latest PC games have a PC already. I on the other hand am not going to fork out three times the price of a PS3 in order to play the latest PC games when my current PC and laptop serve all my non-gaming computing purposes quite adequately.
I plan on installing Linux on my PS3, though not sure whether to wait until I insert a bigger HDD, or run it from an external HDD (which I've read is a possibility). I have 80Gig at the moment, but I want more. It's mostly so I can surf the net on my nice big TV rather than my squitty 17" PC monitor. I hope I can get a Youtube workaround, because that does limit the utility of Linux on PS3 a bit.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
