One of the features we would like to highlight in this release is the support of the DDS-Security specification in the core of ROS 2 (see the [sros2](https://github.com/ros2/sros2) repo for more information).
In an effort to use ROS 2 on a real robot (to gain real world experience) we have been working on a set of Turtlebot 2 demos which only use ROS 2 on the robot. Please checkout the [demo repository](https://github.com/ros2/turtlebot2_demo).
As the "beta" qualifier suggests, this release of ROS 2 is not complete. However, we consider it to the point now where many things are ready for feedback from a broader audience, hence the label "beta" instead of "alpha". That being said, you should not expect to switch from ROS 1 to ROS 2 right now, nor should you expect to build a complete robot control system with ROS 2. Rather, you should expect to try out some demos, explore the code, participate in online discussions, and perhaps write your own demos.