I mean, they already have Skyrim or the remaster gameplay footage in that video, and that's more Bethesda than Nintendo has got in awhile....so it's already better graphically than the Wii U etc.
Nintendo's main games are games like Mario, Zelda, etc which aren't some powerhouse graphics kind of games. They have their own beautiful looks which don't require the specs that your Uncharteds, etc require.
I think the Switch will be decent. I don't know how much I'll be using the handheld part of it, but it all really boils down to how much support they get by developers. It could be a hit, or it could just fall off. Who knows.