The new version of MediaWiki has been on test wikis and MediaWiki.org since April 1. It will be on non-Wikipedia wikis from April 7. It will be on all Wikipedias from April 8 (calendar).
You can now add the same special characters with VisualEditor as with the wikitext editor. 
Many bugs around copy-paste in VisualEditor are now fixed. 
You can now use basic tools of VisualEditor in the new talk tool. You can add links, bold and italics. You can also mention people. 
You can join the next weekly meeting with the Editing team. During the meetings you can tell developers which bugs are the most important. The meeting will be on April 8 at 18:00 (UTC). See how to join.
You can again comment on how you want to see Wikidata edits in your watchlist on other wikis.