Party Robotics have launched a Kickstarter project to fund their cocktail-dispensing robot, the Bartendro. The Bartendro has, at it’s core, a Raspberry Pi.
In their effort to fulfil their goal of creating the perfect cocktail perfectly each time, they use Arduino clones (essentially) as control boards which are then linked to the Raspberry Pi which does all the UI and dispensing calculations. Peristaltic pumps then dispense the correct amount of the various liquids.
The whole project is made complete by the Pi running as a wifi hotspot that anyone can connect to to make a cocktail order.
Disclaimer: I have no connection to Party Robotics, I just thought this was cool.