First of all, I would like to thank the Oracle Solaris team engineers for their tremendous effort they put in one of the best operating systems currently available in the world.
On August 28, 2018 Oracle launched the new Solaris 11.4 release. The new software can be downloaded from https://www.oracle.com/technetwork/server-storage/solaris11/downloads/index.html
Start getting by checking out the new features at https://docs.oracle.com/cd/E37838_01/html/E60974/index.html
Ensure to read the release notes at https://docs.oracle.com/cd/E37838_01/html/E60973/index.html before upgrading, there are some differences.
When I have the time and opportunity I will post some examples about Solaris 11.4 configurations and/or differences with Solaris 11.3 so check out my blog once in a while for updates.