Eventually the "McDonalds" will be a series of smart contracts running the restaurant with an algorithm as the "owner".
And there won't be stand-alone restaurants anymore, only ghost kitchens for delivery. McDonalds et al will only exist as a brand on a phone app.
The future will be a combo of Idiocracy and Wall-E.
I had that idea for an app and was planning on getting started on it until I looked into laws.
The idea was that home cooks could take orders or have a large meal cooked and put it on the app. People order the food like on any other food app and some delivery service comes and picks it up and delivers it. This would be for people looking to make a bit of extra money, people like my mom who like to make cookies but could never eat as many as she cooks so she just gives them away, people like my wife who can cook a five star meal but don't want to be running a restaurant with all of the headaches that come with it. Or even someone with 3 kids that is cooking a recipe that can easily add 2 or 3 more servings to send off on a delivery for a bit of spending money.
Then I checked the laws in the US and no state allows you to sell food made at home. There are some very limited exceptions such as granola bars or some shit like that.
One more thing to look forward to when it all collapses though. Home delivery of some nice old lady's chocolate cookies and side businesses for the home cooks out there.