I have shopped Chili's for years. They have been shopped here by two different MSCs, the distinction being a geographic line, separating franchisees. Each MSC has vastly different observations and reports. Frankly, I would not spend my own money at Chili's, whether full-service, or tablet, though I enjoy the shops. I feel for hardworking $2.13/hour servers, being at the mercy of customers, too many of whom are cheapskates.
I shop restaurants, and very rarely do I have to go on my own dime. Whether a shop or on my own, it is for the overall experience of atmosphere and service, not just the food. Someone in my family, or me, can prepare delicious meals, for much less money than menu price, and time spent in report. And, grocery store reports are way easier. Take away the interaction with my server, which is usually enjoyable, put a tablet at my table, and much of my reason for being there has been taken away.
With tablet, the server will likely not receive a 15%+ tip. I don't see this as any more than an attempt to further screw servers out of income, and some diners out of the expected experience. If presented with the opportunity, I will voice my opinion.