If they made a small phone like this with a fat battery (not because I'd use it a lot, but because hotspotting takes a fair bit of juice) I'd use it as my main phone.

Then carry something like a Microsoft Surface or convertible Chromebook in my bag, which you can easily whip out if you need to use Google maps or something that favours a bigger screen.

Seems like a no brainer when the traditional laptop category is going more portable with convertible form factors, and tablet are getting even better at productivity. But maybe I'm missing something :\