That can be seen and felt
3D Holograms when and where
Scientist at Bristol University located in England have created these 3D holograms that can be seen and felt. this became known to the public on December 4th.
How this works
It is called UltraHaptics. They find Ultrasound frequencies in the air, then condense them to create pressure difference that can be felt and seen. up until now they have been just making spheres in the air to experiment with it.