So, here are my initial thoughts. When I woke up this morning, and I saw this trailer on social-media, at first I thought it was just a fan-made trailer. Then I went over to Nintendo.com and saw that it was a legit trailer. So, I watched it there.
THE NAME - Nintendo has decided to make the Switch a "brand" at least for the short-term if not long-term by doing something that they have never done before and that is "numbering" a console in succession. It's probably the best course of action, and is one of many signs of a change in strategy by the new management-structure in Nintendo of Japan.
While the historical rule of Nintendo of always naming a console after what the "hook" of the console is still loosely applies, it's not really applicable here. This is more in-line with successful consumer products such as the iPhone, or in-line with what Sony has done with the PlayStation brand.
It also suggests that Nintendo plans to stick with the hybrid-design from now on, or at least until the form factor is no longer viable in the marketplace, which is a sound business strategy in my opinion.
THE LOOK - Well, let's just keep it a buck. We've SEEN this already. Literally EVERY SINGLE THING we saw in this trailer has been leaked already. I'll touch more on that in a bit.
It looks nice. Very smooth and sleek. The orange and blue accents underneath the thumb sticks really pop out and give a nice charm to the design. However, like I said, we've already seen this.
THE GAME?? - Well, the leaked rumor that this trailer would not focus on software was true because it did not. They showed Mario Kart..........

That trailer was very underwhelming. I guess the Direct is where we'll get real information about the console and games and actually be enticed by them, because as it stands, there's legit nothing interesting being shown here, and that game they showed and that I waited 11 years for...looked inferior to its predecessor...? Also, that name really tells me the Wii U traumatized Nintendo and strongly pushed them to be as clear (and safe) as possible, because they haven't used that naming format once in 48 years.