Most of the games I'd want for PS3 (or 360) are available for and better for PC. The few console exclusives that I wouldn't have access to I can just live without, really, since they are rather few (I can only think of two off the top of my head, and then only one upcoming game on top of that), and moreover, I don't have all the time in the world for games like I used to in the past. >_>
And yeah, I of course have a Wii for games as well. There are quite a few games on the horizon that I'll be wanting to pick up as well, if I can find the time.
It's not so much a money thing, as I could easily afford a PS3 (or a dozen, lol). But it wouldn't be worth the investment, since I wouldn't get much out of it that I can't get already, and I wouldn't have the time to justify it either.