Plasma 5.10 is just out with many spangly new features to make your desktop run smoother.
Being able to group and ungroup windows in the task bar is a small but handy feature when you turn it on.
Having icons back on the desktop is on by default incase you want to mess up your desktop.
Future proofing is happening with improvements to Wayland (install plasma-workspace-wayland if you want to try it out) and experimental support for Snaps.
KDE neon User Edition 5.10 is out now with the latest packages. Grab it and try out or just upgrade for existing users.