Out of freakin' nowhere. This, the Tomodachi and the Smash Directs seem to be the next level of Nintendo marketing, the logical step after the usual directs.
The game looks spectacular. I have no words, nothing on this artistic level exists on any platform at the moment (there're plenty of technical beauties though, like Infamous SS).
The horn is a game changer. It was about time they introduced a counter-measure to the dreaded blue shell.
Last two characters are shit, though that's clearly the starting roster, if Mario Kart Wii is anything to go by, there're gonna be lots of surprise characters to unlock.
The fact they've shown every single track is fishy, I don't think it ever happened before, maybe there really could be a few still hidden... even though I doubt it frankly. 32 tracks is a massive amount already.
Mario Kart 8 is shaping up to be the best Mario Kart ever, bar none, it has almost everything good that ever was in the series: customization, tricks, going underwater and flying, retro tracks, boosts and jumps, lots of characters and karts, bikes, shortcuts, plus anti-gravity and a bunch of new items. If only it had a tag team mode a la Double Dash, it'd be perfect.
Only thing... where the hell is the battle mode? Are they waiting till the last week to reveal it or something?
EDIT: nevermind, I see battle mode is in... but on racing tracks...? There had to be something bad... damnit, why? ;_;