Voxels in the real world, which methods are promising?

[Mitbekommer]

I have always been fascinated by the idea of having moving points in real 3-D space. When the virtual reality helmet of Sony came out, I bought it. I used to take pictures with a reflex camera that was connected to a special attachment that created two pictures next to each other creating a 3-D impression. I also know about augmented reality, which comes very close to what I want. Then there are those Japanese researchers who found a way to use an infrared laser beam to create a plasma. Those are real points in space that you can see in 3-D. Maybe they're even little objects acting as points in space.

1. Which promising approaches to creating real life - movable by computer control - points in space are known?
2. Which promising approaches to creating real life - movable by computer control - points in space that you could even touch are known?