This article ignores several key points. Robots are expensive and would need to be custom made for each restaurant to replace humans. Also, there would be missing the human touch, making a restaurant visit cold and automated. No more "service" and personal touches. You get what you get.
The immediate issue is, who pays for the increased labor cost? You do. And, no, it won't just add a dime to your bill. My labor cost has gone up 150% since I started in this 30 years ago as an investment. All my material costs are also up at least that same amount. The unit cost to you of one of our products was $4 back then. Today it is $8.
I now feel I hire better people but I hire fewer of those people and, currently, won't hire teenagers cause they're unreliable but the quality of person I need to run with this light crew is hard to find, more due to the stigma of working fast food than the actual pay (though that's part of it).
The customer is price sensitive. The customer likes the human touch. If restaurants go robotic, the most popular restaurants will be those without one, and while the idea of raising pay to $15/hour is great, someone has to pay for that, and that someone is you.