As far as I can tell, this is a concept aimed at an incredibly successful West Coast US chain, DutchBros. (DutchBros was itself a copy of a similar local chain in Portland which was bought out by Starbucks.) They are basically limited to coffee and tea based drinks marketed at teens with disposable income and people with tastes that run towards that of teens. Lots of very sweet, very colorful treats in a cup. All drive through, no seating, no or limited food. If my own daughter didnt force me to sit in lines to buy this crap, I never would have believed it was a valid business model.
While drive through coffee is not new, this is really not a coffee but syrup beverages which may or may not have coffee or tea somewhere in the mix. Pretty sure this is sold as a “coffee/tea break” for people who dont really like coffee or tea.
These places are ridiculously successful. McDonald’s version would likely add a limited food menu, but I doubt it will be the same as the regular franchises so as not to be direct competitors.