First of all, my theory why some of us (myself included) feel that new systems no longer induce the "wow" factor feeling.
Graphical leaps are getting smaller and smaller.
Going from 2600 to NES...Wow!
From NES to Genesis...WOW!
Grainy FMV on Sega CD...Wow!
Genesis to PS1...Wow!
PS1 to PS2...Wow!
PS2 to PS3...meh.
Here's another one. Mario kept looking better and better, but once the gamecube version hit, he didn't really improve all that much.
We're visual people, but the room for improvement is getting smaller and smaller. It's actually smart that Nintendo is focusing on innovation. (Wii, DS, 3DS, Wii-U)
Yes, they have had some duds (Virtual Boy and Wii-U as far as sales go).
Switch doesn't floor me, but it does intrigue me. I like the option to play on either a TV or laying on the couch while someone else is watching TV. The 3DS is my current favorite system and Nintendo is my favorite game maker. Even if it was just another plain system, I'd probably be interested just for the next games in series such as Zelda and Mario Kart.
Two last thoughts:
1) Portable no longer means having to fit in your pockets, thanks to massive smart phones and iPads.
2) I hate to say it, but we (who grew up in the 80's and 90's) are no longer the target audience. Now it's all about Millennials, who, on the whole, have different tastes than us. I believe that is who the trailer was targeting. However, future ads may target more kids and families.