Community - please take a look at this article, "What's new in Red Hat Enterprise Linux 9 Beta", detailing all of the feature highlights included in the Red Hat Enterprise Linux 9 Beta release. I will continue to add resources as they come through, feel free to add your own resources, documentation, questions, etc.
Beta highlights include:
Improved Container Development
Easy Download and Testing
Access the beta subcription and related documentation in the Red Hat Customer Portal here.