A developer has submitted a draft to the KDE team for KWin to hook up a full Plasma VR mode and it looks pretty awesome. As it’s currently a draft, it needs plenty more work before being accepted but the idea behind it and how it looks has me quite interested.
Could be something fun for the Steam Frame too.
Maybe working but not published into the public releases. Probably will continue to be worked on until Steam Frame is about to go on sale.