KDE 4.8.0 is now released by the KDE developers and it's dubbed as a major release, no longer a maintenance update like the previous release. This new release brings a major improvements to all components, such as Plasma Workspaces, Applications, and as a Platform.
I have been running KDE 4.8.0 for few hours as i have just upgraded using AlienBOB's package on Slackware-Current and it feels so good. It's faster than previous release and i'm happy with it.
KDE 4.8.0 will shortly be landing in your Linux distribution, so just wait and see to feel it. With this release, KDE 4.8.x branch will start it's monthly-release journey starting on February where they will deliver a maintenance release.