Yep. Games you swap out, rain checks, etc., will be reflected in your online My Nationals account and you could then transfer them or print them.
The concept is a good one if they executive it well. But it will be a challenge for people who are not computer or internet savvy.
No, the challenge will be the Nationals ability to walk those customers through the process. Will they hire/train additional staff to handle the increase it calls that are sure to arise due to the new system. People can be computer literate and internet savvy and still not be able to successfully use a new software program. The onus is on ownership not the patrons.