First of all best wishes, may your dreams come through in 2019!
2019 will be the year that Atlassian releases Jira 8.0, mobile apps for Jira (Software) Server and the end of HipChat/Stride (Cloud & Server). Have you migrated your HipChat/Stride to Slack yet?
Apart from what we know, what would you like to see from Atlassian in 2019?