Will the Apple tablet run Mac OS X, or iPhone OS X? I think this source of Mary Jo Foley’s sums up why it will be iPhone, even though he’s talking about Microsoft’s Courier tablet:
“You can’t install Windows 7 apps on Courier, the source said, and that’s intentional.The original Microsoft Tablets ‘failed because the applications were not tailored to a tablet form factor – that is, Word still had toolbars and menus and scollbars. So, a tablet needs to be like an iPhone – a UX that is specific for the form factor,’ the source said.”
Apple will not want you to run “normal” Mac OS X applications on the tablet, because the user experience will be sub-par – and that’s just not the Apple way. Expect it to use a super-set of iPhone OS instead.