The vast majority of users, when talking about “using KDE”, are talking about the desktop. Plasma, that is. So when you ask “when will KDE 5 be ready?”, your answer will be that our brand new desktop is already at version 5.1 and making swift progress! Stability is quite good, but there’s work to do in the feature area. Distributions don’t ship it as default yet.
Source: Ziobudda.net