There's no point having raw power in a gaming PC if the games it's used on are not the ones you want to play. All that extra power seems to do anyway is produce slightly better graphics (and in cases, minimally better framerates), and graphics are not the main thing which influences a lot of people's opinions of how enjoyable a game is.
If I played games on my PC, i'd be missing out on games I really enjoy which are not available on PC.
Especially FIFA 09, football games are almost always the games which stay in my console 90%+ of the time, the main reason I got my 360 was to play FIFA (08 at the time) because of how pathetic PES is.
A lot of console exclusives are quality sports games (FIFA 09, Top Spin 3, Skate, MLB: The Show, NBA 2k, NHL 09, Madden etc.), most of the PC exclusives seem to just be shooters or strategy games, which just bore me most of the time.
So, if you're fascinated by seeing a few more pixels and play mainly shooters then PCs are for you. If not, then a console is the better option, in my opinion.