If you take a bunch of LED bulbs and stick them on something, make them blink and move the something, your eyes will give a lasting image. This persistence of vision (POV) effect is the basis for television. Some enterprising geeks have made 3D displays by putting LEDs on an arc and spinning it.
Now my questions are:
1) How do you film and process content for this display?
2) What content would be useful or interesting?
Jenny mentions knitting instructions. Martial arts demos come to mind. Design prototypes from CAD would be fairly easy because you don’t have to film them.
Hmmm, thinking about it, the display still needs a way to show things within the sphere.