I went to a sushi restaurant in Brisbane which used touch screens for ordering. That was pretty nice for ordering a few things at once without having to interact with a human being (something hackers hate to do...).
It reminded me of a place like that I went to near Red Square in Moscow, which was an internet cafe/pub. Unfortunately, that place had a bug: it de-duplicated your order so that you didn't accidentally order the same thing twice. But that meant it was difficult to order pint after pint after pint - it detected all but the first as duplicates; and worse, silently discarded the subsequent orders rather than telling you.