Maybe I just have a complete misunderstanding of what this device actually is.
It's not the next Wii U, it's the next 3DS. The docking station is just to get the display sent to the TV, but all the magic happens inside the handheld device. Thus what you play on the go is what you'd get at home.
And on that front a new device was needed since the 3DS is getting pretty long in the tooth, especially graphically compared to Smartphone games. Heck, compared to Vita games. I'm actually pretty happy that they are making a handheld again that isn't overloaded with shitty gimmicks like two screens, stylus controls or useless 3D. This seems to be made for one thing and one thing only: play games in good quality. With proper controller controls and not touch BS. And that the thing can also be used at home will hopefully lead to more games for it being designed as "full fledged" games instead of as obvious handheld games. The Vita was much better in that regard than the 3DS. There is nothing even remotely comparable to FFX Remaster or Persona 4 which I could play on the Vita on the 3DS. With this I'm hopeful that that might change.
After a few days to think and getting at least some question marks cleared up I'm actually onboard with this device. Especially since I'm playing a ton of handheld games anyway since I'm staying 3 nights every week in hotels so it's the only sane way to get my gaming fix outside the weekends (heavy $2000 gaming laptops excluded, but I don't want to go that route yet).