You can't solve this with crypto alone without some (external, legal, non-crypto) way to force Sony (and others) to permit these conditions. The existence of s

You can't solve this with crypto alone without some (external, legal, non-crypto) way to force Sony (and others) to permit these conditions. The existence of some platform (crypto or otherwise) where (a) (b) and (c) are supported is not a solution, since obvious financial incentives and all the historical experience clearly show that Sony (and others) will distribute their content there if and only if that platform can prohibit these things, especially (c). The key problem is a misalignment of incentives where content producers have a strong desire to distribute things only in a user-hostile way and the market power to do so - it's a market problem, not a tech problem, it is not possible to solve this problem by providing some new user-friendly platform or technology.