This is awesome for two reasons: 1) it's just plain cool and 2) it finally gives a reason to tolerate annoying people who hold up their cell phone cameras during concerts.
It's funny because watching a concert I thought how cool it was that when someone had a camera or phone in my line of sight I could simply switch to another unobstructed view. Then I realized the chances were good that my new view was coming from the very camera I switched views to avoid.