Annual Pass holders get free parking anyway, or premium Passholders do anyway.
As for the Swipe you card for a dispatch system that could just work out.
I belive we shall see the bus system work much like it does now, however i belive the swipe for dispatch service will help then to reduce wait times.
I.e. if there is a wait fo 20mins at a resort for some reason (delay, or just planning belived there would be no need for bus at that time) a guest could swipe there card and request a bus, making dispatch aware there are guests waiting at said stop.
Now if these terminals had touch screen these could still be used by non resprt guests.
Now when a resort guest swipes it brings a personal greating, "Hi John" etc, adding a little personal magic, then you point on the map where you want to go, point at MK, then it say are all you party travling together today(taken from the info gathered at time of check-in), yes or no, then you click either how many are with you, then it could give you a rough wait time. Also when you use your card at a park or at another hotel, it asks you automagically if you are returning back to your resort. It can also make guests aware if they may need to Transfer i.e. monorail or to another bus.
Non guests can still use the system, however the interface just say "Please swipe you resort keycard, or press here" if you press here is does much the same as above but its not personalized.
Its makes no sence for Disney to stop non resort guests from using transport, I always drive from Resort to Resort whenever we go, but we stay of property so its easier for us.
This new system just makes it easier for Disney to offer a little more magic, make traveling easier for guests, and monitor popular routes etc.