Stolen comment from Reddit:
For people who don't know that this means: it's VR locomotion sickness.
The "mismatch" (ie. disagreement of sensory input) from your eyes ("ocular system") and your vestibular system (your "inner ear", how you feel movement) when you see movement (in the VR headset) but don't feel movement (because you're not really moving).
This mismatch makes most people feel sick, hence why most VR apps/games use teleportation by default.
Palmer is claiming to have found a universal way to smoothly slide around in virtual worlds while not feeling sick.
This is an extraordinary claim. It would be incredible for VR if true - literally more important than any other advance in VR.