Some sort of badge-system would be cool for kids. Checking in at parks and museums, walking certain distances, visiting a Zoo, etc. could unlock reward points that could be used in a virtual store. I could see something like this being integrated into a new Nintendo title.
Unfortunately, it's is not known if there is a rear camera or GPS on the Switch. :-\ But there could definitely be Wi-Fi check-ins. And maybe a pedometer function in place of GPS. *crosses fingers*
To the man who only has a hammer, everything he encounters begins to look like a nail.