Oh god, I wish this was around when I was 10.
I am well older than 10 and enjoying it a lot. Gets my steps up(my fitbit is loving me right now) and meeting new people. Everyone is playing it. If they add trainer battles and trading it will get even bigger.
But I am old school big N fan. I never really got into the pokemon games(I am more a Mario/Zelda guy) but I am really enjoying Go. I'll bet Sun and Moon sell like hotcakes when they come out. Might have to buy a 3DS
I am also definitely going to pick up the mini NES when it is released. I hope they make millions of them because they will be tough to get before xmas if not. Those things will be insanely popular.
I'm going to have to watch the NX info carefully. Even with their current stock spike they could go way higher. Maybe even to Wii levels. With their upcoming mobile releases, mini NES and that amazing new Zelda, Nintendo could be set for another huge resurgence. Like they have done in the past. Might have to get stock this time. I missed out on the Wii boost, I shouldn't miss out on this one.