This demo looks at a first glance convincing, but it is a one way data stream. The point of using existing infrastructure to fill the room with high speed data reminds me of all the R&D and attempts made by infrared LEDs. The line of sight (LoS) problem and interference by sunlight turned even simple applications like wireless speaker systems to complicated technologies. The supposedly simple ICs with an AGC (auto-gain-control) turned to complicated over 110dB solutions with all kind of stability problems. Extracting the datastream from multipoint sources without data corruption, the increased power demand for longer distance communication out of mobile devices were all application problems, which did not allow to get that solution of the ground. Dr. Haas lab solution looks great, but for me considering the idea form a practical implementation point of view using visible light via LEDs is a far distance.