Well the ps3 does a good 900-1000ppd and the 40Gb only uses about 150watts or so.
Yeah i can get a bd drive for my pc...but my monitor is only 22" and i have a 32" hdtv right here in my room and theres a 50" hdtv in the living room. With the ps3 i can just hook up and watch movies on either of them.
I tried getting my hdtv to run with my 8800GT and that was epic fail.
If i get a ps3 (which i would like to for the blu-ray player since i have an hdtv) then ill put it to fold when not watching movies. I most likely wont get any games for it since im not a console guy.