Just to add my 2p - there's been more than a few people saying similar things on lots of forums, Hexus included. I have seen very little reason to upgrade my nearly 2 1/2 year old 8800gt for exactly these reasons (unless of course I get a bigger monitor.... )
It was a good article, and it made the point as well if not better than I have seen it made elsewhere, but I hope those concerned don't take too much offence if I say that I don't think it will win an award for a startlingly original observation. That's a long way though from saying it's plagiarism though!
I personally can't see the pc market getting a massive revival until the next gen consoles come along. Shame that seems like some way away yet.