"I think the plan is probably to take everything related to UX into the closed part, that Samsung, HTC and etc. won't then be able to change to create their own

"I think the plan is probably to take everything related to UX into the closed part, that Samsung, HTC and etc. won't then be able to change to create their own UX," I doubt it. The manufacturers would revolt at that point, and potentially fork the entire platform.