the mymagic+ technology yes.. the bands probably not.. shanghai was built with everything and
disneyland has been getting the technology added slowly. There was a newspaper article a few months ago where a disney exec basically said shanghai was not getting bands and now mobile technology offers them the same things instead or the band technology they invented when there was no other option..
So we should start seeing more from phones and I doubt anywhere else will get magicbands for free. I do think if they make money that disney will sell them everywhere and they would work but something on the phone is going to be the free option.
I'm mixed on this myself as phones break or run out of power.. that would be weird with your room to not get in because your phone died.