Okay, here's one issue we're going to have to disagree with. I get that multi-tasking is important with folks here. Don't disagree actually. But what I do have a problem with... on the tablet format, none of them really do effective multitasking on a touch based UI. It just... doesn't exist in tablets.
Things like Office, AutoCAD, true Multi-task, true and good file explorer, keyboard support, mouse support, file transfer freedom (it's absurd I need to list this... both Android and iOS need third-party apps to do it....), more than SD memory support (real Hard Drive with multiple tens of gigs) and stuff.