Surface-Based Text Entry in Virtual Reality
Develop and validate a reliable method for text entry on physical surfaces while using virtual reality head-mounted displays, addressing the persistent difficulties observed in current surface-based approaches.
References
And despite the fact that many people are working on hacks for text entry in VR on surfaces, it is still an unsolved problem.
— Hovering Over the Key to Text Input in XR
(2406.09579 - Gonzalez-Franco et al., 2024) in Finger Tracking and Typing (Section 2.3)