It won't though. A screen on the card terminal is free - if just 1% of people misclick the button and pay a tip, the company still wins.

A restaurant is fundamentally selling an experience. These screens do not improve the experience. Therefore, they have some cost to the business. The question is whether the cost is recuperated.

Doesn't matter in touristy places though, because you don't rely on repeat customers.

> A screen on the card terminal is free

... consulting companies developing the terminal entered the chat ...

(just kidding, I agree with you)