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.
well a Wall-E is at least useful for finding discarded stuff. like Ramon noodles and ammo.