Not everyone has a phone though, or a new enough phone.
Honestly I want to see Nintendo have a return to form. Quit trying to invent problems to fix, and just make a console people want. There is no shame in them looking at what their competitors are doing successfully. Actual online infrastructure that doesn't get shitcanned every generation. Party chat, because if they truly want to push the social aspect of gaming that is a huge thing. Steady games, if not first party publish third parties even better, actual real timely third party releases. Not months after, not years old ports, same day games. So of course power is also important.
The hybrid thing intrigues me in a small way but honestly I just don't care. When I play a handheld game I'm almost always at home. So the same thing would happen with this and it's what I do with the Wii U. Play the small screen and watch TV on the big one.