Think you have a really good idea for a HoloLens app? Microsoft might just help you build it. The tech giant has launched a Share Your Idea challenge that asks developers to submit their holographic app concepts by January 11th. It'll put the three most "viable" (that is, both good and realistic) ideas to a vote on Twitter, and will build the winner itself. You'll still have to devote some time to the app afterwards if you're successful -- you'll sit in for code reviews and Q&A sessions -- but this should be much easier than writing augmented reality software from scratch.