the best big step Nintendo could take at the moment would be to create a Switch smartphone
wouldn't look too different on the outside, just an Android or whatever smartphone mode, with Google or Nintendo's digital services, music streaming etc...
imagine the sales and the exposure a real gaming smartphone could get, and I think it's the right timing too, smartphone technology is cheaper and is not moving fast at all the last few years, why carry two devices around
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^