A 'touchable' 360-degree holographic display.

Bron; www engadget.com
Touchable is a stretch when talking about Vermeer, but we'd definitely call it interactive. Instead of hiding the 360-degree display under an acrylic or glass dome it uses a parabolic reflector to float a 3D "object" in space and tracks hand motions with an IR sensor or Kinect.
Vermeer is a novel interactive 360° viewable display suitable for a tabletop form factor from Microsoft Research Cambridge. It provides viewpoint corrected stereoscopic 3D graphics to simultaneous users 360° around the display, without the need for eyewear or other user instrumentation. In contrast to other systems, Vermeer allows users for the first time, to reach into and directly touch 3D objects inside a display volume. It also enables simultaneous users 360° viewing of the 3D object. Inherently other 360° systems restrict interactions to outside the display volume behind a protective glass or plastic dome.