I couple of comments regarding the information in the above table:
- ROS Jade / Lunar are also targeting the same Ubuntu LTS as the previous ROS distro
- ROS Melodic is targeting Ubuntu 18.04 LTS (not 16.04).
- A beta release of ROS Noetic won’t be available before the end of 2019 since it will target Ubuntu 20.04 (and Python 3) and neither Ubuntu 18.04 not 16.04
- ROS 2 Dashing is scheduled to be released end of May 2019
- ROS 2 E-turtle is scheduled to be released end of November 2019
- (just as an outlook) ROS 2 F-turtle is scheduled to be released in May 2019 (together with ROS Noetic) also targeting Ubuntu 20.04