I hope they change their strategy regularly and appropriately.
But who's to say what's "appropriate" for their strategy? Relatively speaking, Apple is a teeny company, competing against some monstrous companies when it comes to PCs. And, right now, from a business perspective, they're focusing their limited resources where the most payoff comes: iPhones, iPods, and other iGadgets.
Like it or not, that's where Apple's bread and butter is NOW. Do they have the resources to focus on: iGadgets, Mac Minis, iMacs, Mac Pros, OS X, all of their applications, AS WELL AS another Mac model? My guess is, they don't. My guess is they've decided to focus their resources on the iGadgets because that's where they're making the most money.
From a business perspective, they're totally doing the right thing. Even if that means it upsets some folks who are waiting for A)the next big Mac Pro, or B)a new Mac computer that doesn't even exist yet. In the end, they'll make way more money by selling iGadgets than they will medium-to-heavy duty Macs.
It's sad to say, but that's the way things look right now.
jas