I get the feeling that someone built an iOS version, and it went through the whole approval and release process without someone bringing up the question of what the best architecture for licensing should be.
I suspect that if it had been thought through properly from the beginning, the Android licensing (paid DAW-based license, free apps) would have been the winning option for all platforms, as it means that app users, who may have brought their own device to a session, do not have to buy it just for that possibly single use.
If it makes it to be a W10 app, I predict that it will also use free apps. Personally, I would like to be able to run multiple instances of it from one or more Win touchscreens. That, combined with some of the Remote Device type of facilities, like blocks of channels, could replace MixConsoles altogether. We would then have multi-touch Cubase. If they could be saved as part of a workspace, then we would the best of all worlds.