that's a bogus opinion quick...

mac osx is unix and unix can be recompiled to run on arm (other flavors of unix has been done before). just takes work. android is linux and has been stripped down and recompiled to run on practically every processor out there (android phones are arm processors too). mac osx just needs to strip out all that excessive crap to turn it into an embedded os... again, just takes work... nothing new, nothing revolutionary, just lots of work...

apple is just trying to rush to the market with the first embedded touch tablet... however, the competition is running neck to neck for its launch date so they haven't stolen all the thunder quite yet...