> A "Steam Deck" matches none of those for example.
That usage is from cyberpunk. It's from Burning Chrome (1982) by William Gibson. "She took a little simstim deck from her belt and showed me the broken hinge
on the cassette cover". What he's describing is similar to the belt pack of the Apple Vision headgear. Gibson's headgear is a headband that transmits into the brain, not clunky goggles.
A "Steam Deck" matches none of those for example.
This is a very well understood and established term. I fail to see what you made this comment.