"The quantum world is still full of uncertainty, but at least our attempts to look at it don't have to add as much uncertainty as we used to think!"

http://www.bbc.co.uk/news/science-environment-19489385

"But there's actually a lot of technology that relies on quantum uncertainty now, and the main one is quantum cryptography - using quantum systems to convey our information securely - and that mostly boils down to the uncertainty principle."