CentOS 8 was released on September 24th, 2019. It is derived from Red Hat Enterprise Linux which was released on May 7th, 2019.
As you are aware, CentOS is a community-supported enterprise operating system, compatible with its upstream source Red Hat Enterprise Linux, from the CentOS Project.
There are notable differences between EL-8 and EL-7 in Kernel, package repository format, and lots of new features that EL-7 do not have.
Since CentOS 8 is derived from RHEL 8, you would get the features of RHEL 8.
- The Cockpit is now available by default
- CentOS 8 comes with a new version of the YUM version which is based on DNF. This new version is compatible with YUM v3 (CentOS 7)
- RPM v4.14 is distributed in CentOS 8. RPM now validates the whole package contents before starting the installation
- CentOS 8 contents are available through the two main repositories: BaseOS and Application Stream (AppStream)
- It supports up to 4PB of physical memory
- Wayland is the default display server instead of the Xorg server in CentOS 8
- XFS now supports shared copy-on-write data extents
- nftables replaces iptables as the default network filtering framework
- Python 3.6 is the default Python version in CentOS 8
- PHP 7.2 comes with CentOS 8
- Nginx 1.14 is available in core repository in CentOS 8
You can read detailed information about the new features here.