Not sure if you noticed in the Switch launch video, but that's Skyrim they're playing. It looks like Nintendo is putting some effort into third party this time, and they'll be the only "console" which allows you to play "console" third party games portably. Pretty significant advantage.
That's quite a jump you made there: a port of a game that came out in 2011. I don't really think getting Skyrim is a big deal. If you were around for the Wii U launch, they got a ton of third party ports. Comically a game like Mass Effect 3 when I'm pretty sure the first two games didn't appear on any Nintendo platform.
I'd also be wary about battery life. The 3DS and its sleep mode aren't known for being very good on that front.
The fact that they're showing off Skyrim, a 2011 game, in their 2017 console launch video doesn't say much for their hardware's abilities. It says a lot about how beloved Skyrim is, though.
