Yesterday I wrote about KDE's KWin 5 window manager becoming usable to the extent that bug reports are being accepted and it should basically be "stable" for early adopters in day-to-day use. The latest KDE Frameworks 5 talk by Sebastian shows progress being made further on the desktop itself to utilize KDE Frameworks 5.
For those not interested in trying out premature code, Sebastian ended his latest blog post with, "We're aiming at a stable, end-user ready release of the new Desktop shell in summer 2014, at the end of Q2. On of the next milestones will be a tech-preview, which is planned for mid-December, so just about a month away from today. From December, where we’ll reach the point of having the basic functionality in place, we’ll spend time on filling in the missing bits, making sure everything runs on Wayland, and on polishing and quality improvements. Integrating additional workspaces, such as Plasma Active and Plasma MediaCenter are also next year's roadmap. These will become the tablet, resp. media center drivers."