The "Super Tablet" is a very good idea it just is stuck in a weird place.

Part of what is cool about a low-cost tablet (say $150) is that you don't feel that bad about losing it or wrecking it so you can beat on it hard and do things that I would not with a PC.

Something like a Surface costs a lot more and changes the psychology, a lot for me.

Microsoft has that new dial that you can use with the Surface AIO and also HP and Intel are doing interesting stuff with 3D Cameras which again could be game changing for creative work. Microsoft also has Hololens and the entertainment franchise around XBox which goes up against Apple TV, iTunes and all that.

Not everything Microsoft sticks but they are throwing many things at the wall. If anything they got in trouble with Windows 8 by being ahead of their customers and anticipating that "Super Tablet" would catch on faster than they did. They will be back however, at the very least because if you follow the thinness assumption that Apple is based, they will beat laptops.