You can skip through all 4 hours of this, but this morning, Nintendo showed off some in depth looks at Mario Kart World, Donkey Kong: Bananza, The Welcome Tour Software, and Metroid Prime 4.
From what I saw, there are some pretty cool features for the new iteration of Mario Kart. I'm not completely sold on the free racing mode, but it does look as gorgeous as ever. 24 racers, and you don't start in position, you start in mid acceleration. It was pretty fun to watch.
I'm glad I got to see more for Donkey Kong Bananza. It looks like he can practically smash through anything and it looks like you have to find huge gold bananas to keep the game going. It's the Super Mario Odyssey Donkey Kong treatment. I think it's going to be massive, and it looks great.
The Metroid Prime 4 makes me want to dive into the Metroid Prime games. The FPS aspect made me shy away from it, but when I found out it was on sale, I snatched up the remastered version of part one. Nintendo showed off the game with using mouse controls for aiming, and it was pretty cool, especially if you're a PC gamer. Look at that, you can have both things.
People are in New York as we speak with their first hand impressions coming out the woodwork. This writer will just sit and keep posting articles, trying not to argue with the know it all people that is the internet. Be careful enjoying things out there.