Sounds very similar to what the Nats will be doing. It really is not that big a deal if you're computer literate. I just feel sorry for people who are not and have to deal with this.
I'm a Wizards full STH so I'll be getting plenty of practice before the Nats return - doesn't really sound all that involved though.
The real risk, though, is of the card getting degaussed due to being placed in one's wallet next to a credit card or other magnetised medium - I'll probably still use my ticket carriers to prevent this.
I just hope the entering queues don't become like SmarTrip queues on Metrorail/bus....
