Version: (using KDE 4.2.0) OS: Linux Installed from: Ubuntu Packages For all the increasingly common cramped screens, where most windows are always maximized, a tabbed interface similar to Google Chrome's is sensible because it's super space efficient. Instead of a title bar, each app has a tab on a tab bar and is always maximized. This eliminates at least the title bar, and, if applied to all apps, could merge the tab bar with the task list. For a more thorough description, and a picture, check out this hack on kde-look, which accomplishes this all using Plasma: http://www.kde-look.org/content/show.php/Netbook+Plasma+Theme?content=92433 As an example, if konqueror were configured to open links in new windows, each web page would essentially be a tab on the top of the screen, as in Chrome. But so would any local app. This would actually merge desktop and webapps beautifully, and save space. And kwin's fancy window management effects would suddenly become more useful. What's the point of presenting all my windows if one, my web browser, is itself full of ten tabs? And the best things about tabs, such as their simple space efficiency and their close buttons, would then benefit all windows.
Just realized, after glancing back at the kde-look page, that this might be a feature to request from Plasma, since kwin already does what's necessary. Hope you can forward this to the people who might be able to address it. And sorry for the trouble, and for the extra message.
To me this looks like tabbing support for KWin. This would be a requirement also for the "Plasma part" of it - that is Plasma paints the window tabs instead of KWin. Nevertheless I think you can allreade achieve your goal by using window rules. Just set all windows to be maximized and without window decoration. Just the blending into tasks plasmoid would not be there, but that's of course themeable. *** This bug has been marked as a duplicate of bug 42023 ***