I did some independent consulting for several dinner theaters back in the late 80's/early 90's and they were using touch screens with wifi back then. The waiters/waitress' used thhem to place orders at tableside, the order would print in the kitchen where it would be filled by kitchen staff who then paged the waiter/waitress back to the kitchen via the touch screen device when the order was ready.
I helped implement several of those systems, IIRC the company name of the vended software and hardware solution was Squirrel Systems. It's been over 20 years so I may not remember the vendor's name correctly.
In my Chili's restaurant reference above, that was the first time I'd seen a device at tableside on each table with customers placing their own orders. (They were wif iPads btw with customized application software.)
Over two decades ago I was involved in AutoCad solutions for an expanding central PA gas/convenience chain. Their touchscreen pads appeared in the next few years with multiple counter installations where you selected the sandwich components and it was “made to order”, or MTO.
They have expanded all over the region and are known for their service and spotless locations.