3 years already? Wow. It's been a great handheld, IMO. Some killer releases for it: Zelda: Link Between Worlds, Super Mario 3D Land, New Super Mario Bros 2, DKC Returns 3D, RE: Revelations, etc. HUGE releases.
The handheld scene is where the Nintendo of old has lived on, while it's console scene left us old gamers behind for the casual crowd. Funny thing is, though, that the handheld has been selling way better.
One thing the 3DS really needs, though, is more Virtual Console stuff. It's Virtual Console library is a joke compared to Wii's and it's only a matter of time before the Wii's Virtual Console service is shut down now.