I buy my PC games even though they can be easily downloaded. PC needs all the support. It's not a dead platform yet, unlike the PSP.
PC gaming isn't going to die. There're too many people that still game on PCs. Even with piracy problems, many companies are still able to make money.
Co-developing PC games with PS3/360 is also cheap and easy enough that the bigger multiplatform publishers are going to keep doing it.
Also, no self-respecting PC gamer buys PC games at Toys R Us anyways.
i'll be honest: if i can't play it on high-ish settings + 4x AA/AF minimum @ 60 fps on my EX6850 + 8800GTX rig, i'm probably not gonna bother
That's a major reason why many PC gamers, including myself, still enjoy gaming on the PC. It's really the only option if you like gaming with high resolution, good IQ, and fast framerates.
The PS3/360 are touted as being so powerful yet they can barely handle 30fps at 720P.