I found in the last issue of Metropolis a very intriguing kind of ceiling: USG Ceilings TOPO™ 3-D Ceiling System:

The TOPO™ 3-D Ceiling System transforms flat ceiling planes into gently rolling landscapes. The system's uniquely expressive topography is created from pre-formed translucent or opaque panels that install easily into the narrow-profile DONN® Brand TOPO Suspension System. Different effects are created by different translucent values. Use the system to define space and create exciting visual impact in retail, hospitality, office, education, healthcare, transportation and entertainment environments.

Why do I blog this? everybody seems to look at interactive tables and walls but ceilings are interesting too; in this context there is no interaction but I liked the idea of a 3D ceiling system with translucent capabilities.