For me, the thing tempting me to get a console is that... well, it always seems all the good stuff is console-exclusive. The PC is, and for the foreseeable future will remain, a more competent and powerful gaming platform. Problem is that consoles are much easier to develop for. No need to test alternative configurations, you know exactly what you've got to work with, and... how shall I put this... an on average less demanding audience. (Come on, fair's fair - the average Wii player isn't going to be as demanding as the average PC gamer.)
The upshot is that all the good stuff comes to consoles first - and then if it ever comes to PC, chances are it'll be a slapdash port and will never see any of the DLC (Burnout Paradise, Saints Row 2, I'm looking at you two.). This all results in people buying those games on consoles instead, so developers think the PC as a platform is dying, so they continue abandoning us PC holdouts in even greater numbers.
Developers: we PC gamers are still here, we still pay a premium for gaming on what to us is the best and most customisable system available. We are, on average, older and with more disposable income. We'd love a return to the glory days, where DLC was patches (or, believe it or not, actually part of the original game - a crazy idea, I know).
So yeah, I'd love to get an Xbox and a PS3. I probably will, when I have some cash to burn. But for the foreseeable future, the PC will remain, for me, the ultimate gaming rig. So please, devs, let us PC gamers get the same content as the console gamers.