From our perspective, there are certainly a number of advantages to this program and drawbacks at the same time. For one, you already wear a wristband as your entry ticket and so this will simply replace the ticket and serve two purposes. I like the added security layer as well with a PIN being required to make any purchases. This should prevent theft and fraudulent charges being made with the wristbands.
What I'm concerned about is the amount of bandwidth that will be necessary to support so many people in one location using the same system over radio frequency. There is bound to me some issues with this pilot year and I wonder how forgiving the attendees will actually be, especially after waiting in line for a beverage or something to eat only to be informed that the "system is down" and you didn't bring any cash with you. Additionally, I wonder how much analytics and tracking will be done by the vendors and music festival to track the individual's buying history over a period of time or type of purchases and use that for advertising in the future or targeted advertising.
I'm certainly interested to see how this all plays out with individuals attending, vendors selling, and the infrastructure to support it all.
What do you think? Will you plan to use this system if you attend Lollapalooza?