Well, I'm a simple man with simple tastes. I want to sit in my recliner, push a button on a wireless controller, and be playing Xenoblade Chronicles on my HDTV within 1 minute. When I'm done I want to turn it off from my seat, flip to something on TV, and go online, also within a minute. You can't do that on a PC yet that I know of.
$1,100 is still more than 3 times what I paid for my PS3. While I agree that PCs can be a lot more powerful than consoles, that's been the case for ages. It's not about power it's about the games and the experience. I just don't get the same experience sitting at a desk playing on a PC.