The roots of tangible 3D tabletops are situated in Tabletop interfaces, which represent multi-touch interfaces and several persons can simultaneously interact directly with a flat surface, using their fingertips. Towards this a tangible 3D tabletop exploits the potential of tangible tabletop interaction and 3D projection.
This combination offers a new functionality on tangible objects, which can be augmented with visual content on the tabletop. Its tangible object can be augmented to its physical shape, position, and orientation.
This means that multiple individuals can simultaneously collaborate, manipulate tangibles, use multitouch interactions with the tabletop and visualize the effects of interactions.
Halskov K. & Dalsgaard P. (2013). Projected Play: A Tangible 3D Tabletops, PerDis '13, June 04 - 05 2013, Mountain View, CA, USA