Absolutely. Been travelling with a SD and Xreal Airs for the past 2 years. Fantastic for gaming and video consumption.

Does the device ignore head tilt, keeping the screen in-place as your head moves?

It appears to have that mode they call "Body Anchor" - limits the device to 72Hz with "minimal latency".

https://www.xreal.com/air2/

That's only with the XReal Beam. I don't know if it's possible to use the Beam and an external device like the Steam Deck together though.

Edit: yes, it appears it has a passthrough for displaying an external device - it does introduce a little latency though.

Thank you @hobos_delight! (Delightful information for me, 72Hz works for my system just fine thankfully.)

There's also a fantastic plugin specifically for the Steam Deck that adds a bunch of excellent functionality.