Controllers seem small. Also will be interesting to see how it communicates with the tablet. Specs are going to rule this one, ie power vs battery life. I know for my WiiU the extended cable was basically required for any long gaming session(Xeno) to charge it and was one of the reasons I never finished the game.
I do worry about the longevity of the snapping device on the sides. Software 3rd party is about the same as every time they release a console. IF they come out is another question.
Munching On: FF14 storyline, SAO PS4, Horizon.