That is the thing. PC Gamers invest way more in their hardware and I mean lets face it it´s quite hard to resist getting things for free if you can. Take Crysis. nVidia and ATI earned way more money on that game then Crytek ever did. Crytek just got bad PR from all frustrated gamers that have the mindset they need to max things out for maximum experience. If there is anyone winning on piracy it´s the hardware manufacturers.
PC Gaming will always be here. It´s the most common gaming platform it´s just not the most profitable all the time. Glowing exception is World of Warcraft or The Sims of course
I do actually own PS 3/Xbox 360/Wii and PC even though I always go for the PC version when there is multi platform. Console port or not it´s pretty much always the version to own. fps games with gamepad doesn´t really work so laggy mouse steering and such is still a blessing compared to that
PC/Wii is the ultimate combo though. Wii have tons of garbage but it has also some of the best most innovative and fresh experiences out there.
Most interesting Xbox 360/PS 3 titles get ported to PC sooner or later. Though Uncharted 2 is really to good to miss and Forza 3 is a must here too... This is the reason I must own all consoles. Except for the bluray on PS 3 of course.