If I can't transfer ownership of "stuff" between the stores?(installation platforms), or if I can get banned from a "store" and lose access to precious products purchases then it is definitely a walled garden. Maybe not in the original definition of the word.
Maybe if we compared it to a car dealership. Imagine if you could only buy and sell replacement parts for your car through the dealership where you bought it. Or if you try service a car and can't because you can only do that at the original dealer, etc.
This whole "walled garden" stuff will morph into region locking that we had before.
Isn't what your describing what's being changed actualy ?
You currently buy an apple phone and can only buy apps from apple "dealership"
This will allow you to buy apps from different "dealerships".
That does not guarantee "dealerships" which provides the behaviour you want, but it makes it possible from what I understand.
Maybe if we compared it to a car dealership. Imagine if you could only buy and sell replacement parts for your car through the dealership where you bought it. Or if you try service a car and can't because you can only do that at the original dealer, etc.
This whole "walled garden" stuff will morph into region locking that we had before.