I'm under the impression they bitten more than they could chew with the PowerMat. It seemed like an amazing tech - though it would come with a huge markup price, sure - but they couldn't make it work like they wanted.
But, for those prices, they really should put a fast charger in the boxes... It's one of the annoying things Apple does. The fast charger would cost them very little extra, their markup would remain huge, people would be happy.