KDE 4.4 Beta 1 has been released, and the talk of the town is the new “tabbed windows” feature. They completely slipped this one past me. I didn’t even know anyone was working on it. Anyway, it is exactly what the name implies: the ability to have multiple windows all tabbed in one window. You can even drag one window onto another window’s row of tabs.
As a writer, I have long wished for tabbed word processing (outside of Google Docs), and now that will be possible with this KWin feature.