Went to see Röyksopp last week in Toronto. I don't go to concerts much - but really did enjoy Röyksopp.
Observations:
a) The band is only two guys. Gone are the days of the 4 or 5 person band. Electronic music only requires a couple of people to play every instrument.
b) Everyone seemed to be taking pictures with their cell phones
c) Several people seemed to be recording the concert with their cell phones
This lead me to believe that in the near future cell phones may become the ultimate personal recording device allowing you to capture every experience in audio or video format.
This is sort of in keeping with greenspun's cellphone pc idea.