To be clear, this is just an alternative Linux OS. The hardware shown in the thumbnail and article is just a mockup meant to represent a potential handheld. Part of their goal is to offer equally good support for all PC game stores (epic etc) vs the “steam first” experience of the deck.
Dedicated builds for the Steam Deck and other handheld PCs are to come later this year.
So Lutris?
And will this have big picture mode? Because basically Steam is the only one that supports the PC, the Deck interface and also controller first TV.
[Edit]
Read the update, so it’s all some sort of faked announcement.