How would you unify all the Windows stores? (Windows, Windows Phone and Xbox Store)

This has been floating around in my mind for some time.

How will Microsoft actually unify all the stores (or just the RT and WP store at least) into one single intuitive experience? I mean like how do you think it will work and will they do something like Apple by enabling Windows tablets to run Windows Phone apps while Windows Phone apps run only WP apps?

Also, how do you think the user experience will be like? I'd love to hear from you guys as I'm not that knowledgeable in the technical side of tech, so you guys can explain how a solution might work.

Thank you for reading :)