It lets you set custom actions for four different gestures on almost any device, and they can be used at any time to quickly launch your favorite apps and system functions. (android.gadgethacks.com)
As of this build, enterprises can now run custom actions / scripts during a feature update. (zdnet.com)
That fingerprint scanner is also customizable, you can set it to perform custom actions and what not. (androidheadlines.com)