3D images Touchable

Japanese scientists have come up with an interesting new type of 3D viewing, one in which you can actually touch what you see. Using, among other things, Nintendo Wiimote controllers, the scientists have found a way to interact with 3D images in a way where it feels like you are actually touching the objects.

The Wiimote controllers
track movement whereas ultrasonic waves are used to create what feels like pressure when a user's hand "touches" a hologram that is projected.
So far, the technology has only been tested on relatively simple objects but its creators are hoping to use it to create things like virtual light swithes for hospitals, where contamination by touch may be an issue.