Couple of my impressions:
1. Local Multiplayer, split screen, make this a must have for family trips. Basically justifies buying Mario Kart 8 again, but in the mean time, Fast Racing does the trick. Shinen really nailed that down, I hope MK8's split screen is as beautiful and fast, with no frame drops.
2. I kinda wish the screen was bigger. I'm wondering what kind of future hardware revisions they might have. Maybe 10-inch screen, a sort of Switch XL? I'd pay for that. Might even still fit in the same dock.
3. I don't know whether this is the switch, my Yamaha AV receiver, or magic fairies, but it seems that half the time I put my Switch in the dock, it turns on my AV receiver and TV. Weird. Basically, my setup is Switch Dock ->AV Receiver (Yamaha)->TV (Lg). My AV receiver is never really off, it's just "asleep," but it never "wakes up" when I turn on the Wii U, Wii, Game Cube, PS4, PS3, or any of the stuff that's hooked up to it. But half the time, when I dock the Switch, it all comes to life. Don't know why it only does it part of the time. Still trying to figure it out.