If you think of the tablet as an overgrown iphone that makes perfect sense, if you think of it as a shrunk laptop then less so.
Since the kind of application that will run on tablets is probably closer in flavour to the stuff running on the iphone (with no doubt another chapter added to the app store to supply tablet applications) I don't see how this is a problem for anyone but intel.
Apple has always been very practical about their cpu choices, they've gone whichever way the wind was blowing and they've made some pretty drastic decisions in the past which somehow always worked for them.
Since the kind of application that will run on tablets is probably closer in flavour to the stuff running on the iphone (with no doubt another chapter added to the app store to supply tablet applications) I don't see how this is a problem for anyone but intel.
Apple has always been very practical about their cpu choices, they've gone whichever way the wind was blowing and they've made some pretty drastic decisions in the past which somehow always worked for them.