I still find these apps useful/handy when I'm having a party, I'm over at someone's place with a bunch of different people, or I have family visiting or whatever. It stretches longer than people expect, people get hungry, etc., and then we can decide on a place, and everyone can simultaneously scroll the menu and make their order, and it shows up labeled for each individual.
It's indulgent af and expensive, but once in a while for that kind of ordering efficiency, I like it.
For me and my girl or whatever, it's my fun to just take a little cruise around town, get some take out, and then drive it straight home while it's actually still hot.