Automatic record mixing, but for pretty much everything Right now, you check the pedestals in the gyms, only a couple names pop up, yours and your rivals. You go and check the records for medal counts, only your name shows up. And so on. What if they did some automatic record swapping when you tag someone? It could include their records and victories of the people you tag in addition to your own, to feel like there's more connection. This would especially work well with what Masuda said: "An innovate communication system that will make you feel connected with players from around the world as you play the game." Of course, that's not all I'd want with streetpass, that's just one thing I'd want.
Currently awaiting: Lunar Knights 2, AC:NL, Pikmin 3, XY, WW HD, LR:FFXIII, X, LoZ U, FFVXIII Skarmory would slap the hell outta you