EM Drive Buzz

The controversial EM drive has created some new results lately. 

http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ 

Several groups have worked on versions of this.  In the UK, China, and the US.  NASA tested it in a vacuum for the first time and is reporting evidence of thrust---that's thrust without propellant! 

IF this pans out it will be huge.  Not having to carry propellant with you can change everything about how we currently do space travel.  It only depends on energy, which can be collected from the sun or generated in reactors...