> Few people are buying those things.

That's not really true. While Apple has a huge lead, they've already begun to lose marketshare (95% down to 75% last quarter). With more and more competition coming soon, I don't think that Apple will be able to hold on. One only has to look at the success of Android phones -- which literally didn't exist at all when the original iPhone was released -- to see that such a lead is not insurmountable.

> Have you used one of the 'iPad killers'?

Have you? The Motorola Xoom gets very good reviews -- most praising the software as much as the hardware.