Nintendo sold me big-time on that first reveal trailer( pretty much the first scene when the guy was playing Zelda in his living room, then took the unit off the dock, threw it in his bag and went to the park with his dog to continue playing). The January conference kind of soiled me a bit because outside Zelda( which I could have bought on the Wii U that I owned at the time), I wasn't 'that' sold on the launch titles, or the 'oh look, I can tell how many ice cubes are in the glass' HD rumble gimmick. But I wound up with a unit in May off launch buzz and hype, and it's been great ever since. I don't really have much software for it, just Zelda and Mario Kart, but just the experience of playing docked or undocked has proven a revelation in terms of my gaming habits. I swore off open world/RPG titles because playing anything for 50-100 hours or more just doesn't sound appealing to me nowadays, and yet I've already put 70 hours in Zelda with tons left to do and places on the map to explore. Software-wise, Mario Odyssey Splatoon 2, Fire Emblem Warriors are surefire purchases with Xenoblade 2, Doom, Skyrim and a bunch of indies on my radar.
Nintendo in general this year has been pretty fucking awesome.