2) The idea of having a controller idea is interesting, but then think about this. If you're a person that plays games on the regular, chances are you have gone through your share of controllers. The Stadia however is supposed to be your console IN YOUR HANDS AT ALL TIME. If you manage to burn out a control stick or if you hammer the trigger button too hard, you're going to have to throw out essentially your entire console. Granted, I'm not expecting this to be as expensive as a PS4 Pro or an XB1X, but these aren't going to be cheap either.
3) And since this isn't a typical controller, I'm curious about the battery life on this thing since it's also going to be trying to be sending game inputs all the while trying to pull 60fps, 4k resolution graphics (which I still sincerely doubt will be achievable in the majority of the markets). Further, since we got all of this electronic stuff going on, isn't the controller going to be getting hot? I mean, I'm not expecting it to be painful to the touch, but I'd imagine extended play periods with this thing would get to be somewhat uncomfortable.