I think the right question to ask is: What are most people's computing needs, and are tablets a better fit to those needs? I think the answer to that question is becoming pretty obvious.
Most people already have a PC, and it can do anything a tablet can do. But if a tablet is a better fit, in a few years these people will be asking themselves why they should buy a new PC instead of a new tablet.
Most people already have a PC, and it can do anything a tablet can do. But if a tablet is a better fit, in a few years these people will be asking themselves why they should buy a new PC instead of a new tablet.