As strange as it sounds, I think Valve is extremely well-positioned to ship what becomes one of the first true Linux desktop experiences. There's a huge demand for gaming x ai development, both of which have similar hardware requirements, and Valve is already polishing their linux experience with Steam Deck. If they launch their own desktop with a properly managed OS and hardware, I think it would legitimately become…
The problem is still the desktop itself. Basically none of the existing Linux desktop components are mature, either design or technical wise and more often than not, both. Deck works because most games are self contained, allowing them to have a default game mode that bypasses the desktop entirely.
Churn (and consequent ongoing immaturity) seems to be the price we've paid in the last 10-15yrs of "progress" making them suck less. I hope it settles down a bit soon and we get to enjoy more longer term polish on these improvements though.