Harald Haas, PureVLC CTO and Professor at the University of Edinburgh, performed the first public demonstration of visible light communications live at TED Global in July last year. He showed an angle poise lamp fitted with an LED bulb transmitting high definition video displayed onto a massive screen. When he interrupted the light with his hand the video froze and it was then restored when he removed his hand. The official TED Global site has seen 1 million views and if you count the unofficial sources such as various YouTube versions the number is considerably more.
I think TED created a much greater awareness about this technology and has helped stimulate debate and thinking about the use cases. This can only be a good thing.