I'd still buy one
When you buy a device, you kind of "fill it up" before getting a new one.
When I first got into PC building, it was a case of upgrade the software until it ran slow, then upgrade the hardware until this was unsustainable because the RAM was maxed, the MB had the biggest CPU, but the OS and utilities were becoming too much, even before you tried to open a real app.
Now, with 64-bit, MB's are being built with an incredible amount of RAM space etc. It simply takes longer to fill a build up to maxed, and it will take even longer for the software to make that insufficient.
It's similar to the argument made about 3D movies or electronic music. As if the play, the novel, or classical music, or horse-riding, or painting had actually died as a result of new technologies.
The PC market "ate'nt dead". Not yet.