Someone over at Kno (kno.com) has had some experience with Mindstorms! Check this out - a Mindstorms robot built simply to test the screen of a new tablet device. It's called stress testing, and apparently the robot is swiping at the screen (like your finger or a stylus) and seeing how the screen holds up to the abuse. (It's also testing the built-in light sensor on the tablet's screen, but be sure to watch the video so you can see how a non-LEGO part is performing that duty.)
So - play with your NXT! Get really good at it! You may find a job one day where your experience building and programming LEGO robots may be part of your daily duties!
Read more here.