Agreed. It will be really nice to have this "included" now with all of your other photos and Photopass services. But will this slow down the lines a bit? Now it is smile, shoot, run. With Photopass it will be smile, shoot, tap, run. That tap only takes a second or two but multiply that by all the runners in the line and that will add up pretty quickly.
I've been in some long lines during a runDisney race before and they always seemed to move "quickly". But now I'm not so sure.