I'd be preeeeettty shocked if they weren't made physical figures. At the very least I imagine these will get a limited release, but no way they're staying digital only forever.
Hell, even Quorra didn't stay digital forever in the movie
They could even pull something like, "Formerly exclusive to the iOS and PC versions of 2.0, now in home console versions of Disney Infinity
3.0 you can own physical figures of the Tron characters for the first time!"