Valve appears to implementing a reservation system for the Steam Frame, suggesting it expects demand will outstrip supply at launch

✍️ What we know so far

Automatic note by LuaCat Games, built from what we know about the coverage (who reported it, how many sites, the story’s history) — not a translation or copy of the source.

The platforms named are PC (Steam). So far only PC Gamer has run it, but that's a newsroom that checks what it publishes.

Bottom line: You can treat this as firm, just keep an eye on updates.