The fact is you don't need the uber PC for your day to day computing needs. Using your office software, maybe some web and photo/graphical software, you simply don't need to upgrade.
As others have stated, if the next-gen consoles come with mouse and keyboard I won't be a PC gamer anymore. PC gaming drove innovation. Not anymore.
"You know, the best part of the best drug in the world isn't the high. It's the moment just before you take it. The dice are dancing on the table. Between now and the time they stop, that's the greatest high in the world." - Walter Abrams