I'm in a similar position myself, where I now work in Aberdeen and is not feasable to buty a season ticket.
The smart card would certainly help in not waiting in queues and being able to decide on attending a game if I am back home that weekend.
Another scenario where i think this would also help, is one that I had been in previously. Many students (and others) tend to have to work shifts at weekends so having a system in place that would enable us to pre-empt this. Also a seat (near a friend) can be guaranteed rather than gambling on the pot luck allocation at the ticket office on matchday.