Really digging the design for it, based on what the trailer shows. What's interesting, however, seems to be the fact that all of the computing is done in the tablet portion, which is itself relatively small, even by tablet standards, suggesting that it'll have some serious constraints in terms of the horsepower they can cram in there. That's par for the course with the last few generations of Nintendo consoles, of course, but it may also be an indication that they're continuing to target the casual crowd that they've been losing to general purpose mobile devices for nearly 10 years now.
I really hope Nintendo knocks it out of the park, but I have to admit that I'm slightly pessimistic about their prospects. Had they launched this console back in 2012 instead of the Wii U, they'd be in much better position today. The Wii sold a lot of people on having a console in their home and a 2012 Switch launch would have allowed them to take that experience to more places. But today? Their Wii customers went to Android and iOS instead of the Wii U. People were willing to give up the TV to get more mobility and they've grown to love those smartphones and tablets, so Nintendo is going to have an uphill battle to win people back. They'll really need to sell the "it can do both mobile and TV" angle, but even that path may be risky, since Apple or Google could very easily get into that space with an updated Apple TV or Chromecast that can do far more.
And while I know there are concerns about the horsepower, if I'm being honest, even the Wii U was already past the point of being "good enough" for the vast majority of their customers, hardcore gamers notwithstanding (but then again, those gamers will only be satisfied with a custom PC, since even the PS4 Pro and Scorpio next year won't be capable of running at or above 120Hz or doing above 4K, both of which are things hardcore folks are already asking for). What'll be more interesting is whether or not it has enough horsepower to fill open world games with NPCs that are each driven by their own AI routine, for instance. I recall Ubisoft showing the difference between consoles for one of their Assassin's Creed games a few years back and it was startling how much of an effect it had on the look and feel of the game to have the number of independently thinking NPCs doubled or tripled, thanks to the additional horsepower.
All of which is to say, I may pick one up eventually (depending on the price, games, etc.), but the Wii U is already one of the lesser-used consoles in our house (it's basically just there to play first party Nintendo games), so I'm not holding out much hope that the Switch will succeed in a market that has moved on.