I'm really surprised this has taken so long. In 2000, I made it to my state's Invention Convention, even got an article in the local newspaper with an 'invention' I called E-Waiter. It was a 'tablet' with a simple Visual C++ app to place orders. I legitimately thought I was going to win. One of my judges was the founder of a prominent regional pizza chain. He pretty quickly made the assessment it wasn't practical. I didn't win the event, and being a kid I didn't pursue it further.
Every time I see one of these things, I remind myself that good ideas are only half of the puzzle, the other half is the ability to execute.