I don't entirely disagree, but my point was that it's a lot harder to use a computer without a physical keyboard/mouse than it is to use an Xbox without a Kinect. You can certainly use a Surface with no type cover, but even in Modern IE and other apps I prefer to type with a hardware keyboard.

Let me put it this way: by having a computer (even if it has a tablet form factor, it is a Real Computer) without a mouse/keyboard, you give up half its potential (if not more, depending on how you use it). By having an Xbox without a Kinect you give up none of its core capabilities, just some of its extra navigational features and a distinct minority of exclusive games.