;)
http://finance.yahoo.com/news/inventor-light-based-li-fi-224124733.html (http://finance.yahoo.com/news/inventor-light-based-li-fi-224124733.html)
hopefully he (or someone) will also remake the internet he wants to connect to. It would be nice to have one that was built on security, Vs. the one that we have that was never intended to be what it is.
I can see how your device could receive from a source lighting a room but how does your computer send back to the router? IP communications is 2-way and not just 1-way (from the net to your device). I see how you could receive a television signal this way but you couldn't turn off the lights.