Though other things don't work well. Like Plasma's whole toolbar with clock widget etc. It freezes, and you can't interact with the frozen widgets. Only answers are kill and restart, reboot, or switch back to X. It'll get there, but it's still not at a level I would say is daily driver (for me - I like my toolbar clock to actually tell me the current time).

(Kubuntu with KDE project's PPA to be on latest stable)