It really doesn't bother me too much. Obviously it is nice to see a bit of movement and showmanship, but the majority of bands that I love (Oasis, The Strokes) have never really had a frontman who does much more than stand at the mic, and it has never hampered my enjoyment of a concert. After all, it's all about the music.

As a side note, best current frontman for showmanship is Brandon Flowers. He bounces around the stage going from side to side and standing up on the amps during songs. But he is about 20 years younger than Jon so...