1.) There is no KDE 4.
2.) No 4.x release of Software Compilation will be based on Qt 5.
3.) SC 4.11 is the last release featuring Plasma Workspaces components, including KWin.
4.) The Workspaces parts of SC 4.11 will be supported for 2 years, maybe longer.
5.) Plasma Workspaces 2 will feature KWin 5.0.
6.) KWin 5.0 will be the first KWin release fully supporting Wayland.
7.) PW2 will be released sometime in 2014 but probably not as early as January or February.
8.) Read Planet KDE to get correct news and you won't misunderstand it all any longer.