I was disappointed that Apple didn't price the iPad Mini lower out of the gate. Of course, they're largely sold out through the holidays, so pricing it lower means leaving money on the table in the conventional microeconomic analysis.
But in the long run, if you look at every iPad purchaser as a new subscriber to the Apple ecosystem of hardware and software services, there's value in fighting for every additional user versus Google or Amazon in the low end tablet market. Most customers who buy a low end tablet will stay in that producer's ecosystem for a while, at least a year. Graph the low end market and you see it trending towards zero, to that day when an Amazon or a Google will likely offer you a low end tablet for free, perhaps as part of your Amazon Prime subscription or if you agree to pay for Google Drive.
That's a world in which the switching costs are set by the software ecosystem of each of those companies, not the hardware. It's why Apple lovers are right to fret about iCloud and its underwhelming mail, storage, and calendaring services and substandard reliability, why Amazon might spend a billion dollars licensing videos, why Google tried so hard to switch people over to Google+. They're all looking for a path to software lockin, a more defensible moat.