I have trouble believing it "took an hour" for a bunch of MIT PhD students at dinner to split the check, and that they got it wrong the first time, but that's the alleged event that inspired Rajat Suri to launch E La Carte, a tablet-based restaurant menu app. After working on it for two years—which included doing research by actually getting jobs waiting tables to observe how people order—Suri and some guys from MIT are ready to launch it.
The app goes way beyond splitting the bill; what they've developed is a full restaurant menu that shows you the food and is apparently so compelling that in early testing it's increased overall sales by 10%. Check it out, and be sure to peep the competing laser-projection/motion-sensor technology shown at 1:18:
Join over 240,000 designers who stay up-to-date with the Core77 newsletter.
Test it out; it only takes a single click to unsubscribe