- the Bootstrap-based Clean will be the default theme of Moodle,
- a new more customizable Bootstrap-based theme called “More” will be available with tools for administrators to customize color schemes, etc.,
- standard-based themes will be eliminated and moved to Github pareing down the number of options that ship default with a Moodle site, and finally
- Bootstrap 3 framework is not on the immediate horizon for development as HQ strives to add a level of stability for designers and developers of Moodle and Moodle themes
From an admin perspective this has minimal impact as the availability of themes in the Moodle database of addons grows regularly and themes can easily be installed from the interface a la WordPress installation process. In my personal opinion this is a great step in the right direction providing Moodlers a responsive and modern foundation in which to build courses and communities.
Check out the full announcement here: https://moodle.org/mod/forum/discuss.php?d=256537
Information on the “More” theme is not yet available in the docs/tracker.