According to the marketing promo on the link, it's more than just cool high-speed spycam shades. Looks more like it's supposed to be yet another useless necessity dreamt up by bored cell phone designers with more money than brains...
The one tidbit where the guy threw the Extra 300 into the aileron roll, though, was way cool!! Dunno, I just love flying, and would give my right rear tire to fly an Extra! <3