Indeed. The introduction of SLI means $2000 worth of top-end PC will always beat consoles now. Back in the day when custom hardware could achieve great things, the consoles could hold their own. But now consoles will always be lower spec than a top-end PC rig at launch. The best they could hope to achieve is slightly lower than a top-end single GPU system. And given that the console companies can't beat a PC, it makes some sense to be a little more conservative and chase other features, like an integrated Kinect experience. Providing a unique experience is the best chance the consoles have.
Ease of use probably means PC will never seriously challenge console to the masses, though.
I agree more with Epic, consoles role is to push out top flight graphics to the masses. Graphics they wont get on their iPad or modest Dell laptop. This point may not seem so strong now with iPad at least in range of PS360 (though I still dont see anything on iPad or Vita equaling the best on PS360), but soon we'll see another major leap to at least a 1-2 teraflops GPU in next gen reenforcing the point. That's the only place the masses are going to get 2 teraflops for 399 or less in a plug and play format.
Things like Kinect can certainly play an additive role of course...