I've wondered for a while if someone did box office sales only how it would end up... so this will be interesting for me to watch. I can tell you that it does take extra effort to actually go down to the box office and wait inline to buy tickets.
The only problem is I see scalpers with the most interest and funds to send folks to the box office for them and then sell to the online crowd who prefer the convenience and don't mind paying a little more.
I always thought of ticket masters convenience charges as more of a joke and a cash grab. Buying at the box office often reduces that charge so it should be interesting to see how they get their fair share of money from the ticket sales without the 12-25 dollar "convenience" charges they normally levy.