Given their success with Miitomo and Pokemon Go, I expect Nintendo to focus on some sort of Switch interactivity with smartphones rather than any new online features. Can't stand mobile gaming myself, so I'm not too excited by the idea, but as long as I still get to play new Zelda, Mario, Metroid, etc. games on the thing, I'll be satisfied.
Guess we'll get a full presentation for the thing on January 12th. Launch titles, pricing, features, etc.