I honestly as a standard prefer a standard controller but I find many uses in the Gamepad and so many ideas untapped. Was not a big fan of waggle but liked it for Metroid Prime and a couple other games I would have not had it any other way. Since the Game & Watch days Nintendo has tried to innovate. Sometimes hit sometimes a miss. I don;t think Gamepad is a miss but more of a slow grower.
Something Nintendo is not used to. Obviously Sony is on the idea with Vita and MS with smartglass. So right away it's not a failure when the others have already copied it. Second screen experience was proven by DS and even WiiU as the others already running with the idea. It has even practical use. When not in games for multimedia purposes as people use tablets for Roku or Apple TV. Used to be to get touchscreen remote for the TV had to spend over a thousand bucks for what WiiU offers now and it does it better.
Kinect again cool tech but no practical use for media or gaming. It's just there to be impressive tech but also scare people. MS is not Nintendo. MS bought the company the made the Kinect. Kinect was shown I think was CES 2008. MS does not know how to lead by example with it's newfound toy. SEGA or now Nintendo and even to some degree Sony would bring out a game or series of games they really benefit the new toy and why it's needed. MS has yet to figure that out.