Valve just officially revealed Steam Frame's price, announced that it comes with standalone Half-Life: Alyx, and opened reservations to secure a unit.
First revealed 10 months ago, Steam Frame is a "streaming-first" standalone VR headset with a USB dongle in the box that creates a point-to-point wireless connection between your PC and the headset.
Steam Frame comes in two storage variants, a 256GB model for $1059 or a 1TB model for $1299.
Both storage SKUs come with the headset, tracked controllers, and USB dongle.
To be clear, though, the headset has a microSD card slot, so you aren't limited to the onboard storage.
Zamundaaa (a KDE dev) has said that it works from regular Linux desktop but not from SteamOS game mode (gamescope) here: https://discuss.tchncs.de/comment/28178194
Since they probably have a unit for KDE development it should work just fine.