Check out Glass Editor https://glasseditor.com/ it's made using an unreleased game engine.
(Hint: I'm interested in mostly using this for creating a graphically rich but minimalistic distraction-free ADHD-friendly experience ...that could also be usable in VR for even more distraction free coding - I mean since most pro devs touch type anyway, using a keyboard in VR would just work for us, without any extra stuff.)