(Sarah of the Clue Crew points her remote, first at you, and then at her digital camera.)  You don't see anything happening when you press your remote, but hold it up to a camera & you can see it's communicating to the TV using this spectrum of light
Yet, I see that it has popped back up again  for example, the Barack 
Obama... [DOC] [TLE] Nine Real NASA Technologies in 'The Martian' | NASA [PAR] Aug 19, 2015 ...