Righto, then I'll link to the Razer handheld that's been able to do this very thing since 2013 as well.
The point I'm trying to make is that this isn't even remotely "new". This is arguably the least innovative system that's come out of Nintendo in a while. They're definitely doubling down on the portability factor, but for once they don't really seem to have any kind of "gimmick" to go along with it.