Typed all that I could while watching the presentation. I'm sure there are other places that have things compiled better, but anyway:
★March 3, 2017 release date
★Cost is $300
★Use online services via your smart device; will become paid later
★NO REGION LOCKING!!!
★2 1/2 - 6 1/2 hours of battery life; uses USB Type-C charger
★Mario Kart 8's port or remake was shown
★Has a touchscreen
★Up to 8 Switches can connect to each other
★Right joycon has an NFC writer which reads amiibo
★Left joycon has a capture button; will be able to capture video in the future
★Individual motion controls for both joycons
★Two more buttons are shown on both joycons similar to shoulder buttons
★Color variations for the joycons
★Joycons can attach straps
★Right joycon has a camera
★Joycons have HD rumble (or just the left joycon, not sure); be able to feel objects as if you're really holding them; two new games were made using this: 1-2-Switch (doesn't require people to look at a screen to play; releases at launch) and ARMS (basically a fighter; will have online multiplayer; releases in Spring)
★SPLATOOOOOOOOOOOOOOOOOOOOOOOOOOOON 2; WAY TOO MANY NEW THINGS TO TALK ABOUT, SORRY GUYS (LOL); releases in Summer
★Super Mario Odyssey; sandbox 3D Mario game taking place in a modern day setting; new moves, enemies, environments, and whatnot; releases in holiday 2017
★Third-party games shown/teased
★Game showcase video; shows A LOT of games
★Hands-on events across the world
★The Legend of Zelda: Breath of the Wild's release is... LAUNCH DAY!!!