Releases of the Long Term Support (LTS) version, known as Oracle JDK, will no longer be free. That is, companies looking to stay on a specific version for more than six months would need to get updates from a commercial operator or apply patches from free OpenJDK versions manually.
While extended support will not be available for free, the two versions (Oracle JDK, OpenJDK) are not expected to branch, and older versions of OpenJDK can be kept up-to-date with patches. Oracle will not make them available for free. There would be no proprietary features.