Apple's big iPad problem: How do you convince owners to upgrade when their old machines work just fine?

If it’s the sports car thing that Apple is going for ok, great, but I thought someone might be able to point out a wide market use for a 6 core cpu that isn’t serviced well enough by the more widely used 4 core solution.

Running virtual servers, but I don’t think that’s what Apple’s going for with the Mac Pro.

*Edited to add block quote