Even with the slow movement it's quite jittery. Not sure how much that affects the experience.

The other thing is the demo environment is very dark. All the lamps are dim and angled towards the walls.

Actually that's an interesting point - Oculus has shown that you can do tracking and display updates on a traditional display fast enough to appear more or less fixed to the world.

But Magic Leap's display has a physically spinning component. I wonder if you move quickly there is a gyroscopic precesion effect that distorts the display...

Spinning component?

Yeah it's a fibre optic light that spins in a spiral pattern to scan out an image, kind of like a circular CRT.

At least that's what some of their patents describe.