Cross-wiki notifications will be available as a beta feature on Wikidata, MediaWiki, Commons, and all Hebrew and French wikis on 19 February.
The new version of MediaWiki will be on test wikis and MediaWiki.org from 16 February. It will be on non-Wikipedia wikis and some Wikipedias from 17 February. It will be on all wikis from 18 February (calendar).
You can join the next meeting with the VisualEditor team. During the meeting, you can tell developers which bugs you think are the most important. The meeting will be on 16 February at 20:00 (UTC). See how to join.
The search function on Wikimedia wikis will get a completion suggester that tries to find the right pages as the user is typing. It will also recognize some typos. This will probably happen in March. It is currently in beta.