Wild guess. It's a more advanced Switch. Android streaming on the go, plus you can dock it and use a regular controller on a TV. Also handheld device has the Pixel 3 camera in it, so you can take images/videos and it all syncs like Google.
Oh shit. This would line up with 'not traditional console' and 'not streaming only box' - i'd Be totally down for something like that as long as the local performance is good enough - I.e switch level minimum - and streaming as an option for pc quality streaming and good third party coverage