Yep similar to steam os / steam deck.
It's really good user experience, ticks all the boxes of what a lot of linux evangelists claim the windows will all want to switch to . It's even surprisingly usable in desktop mode (with mouse and keyboard).

That's what you can do with linux on defined hardware and with a dedicated team paid by a fairly large corpo making cash out of the users.

But the linux user base is way more diverse than that - not everyone is going to want graphene , or steamOS type thing. especially not just to pander to windozers.