This is especially handy if you often switch among the same few apps, e.g. a browser, a file manager and an editor, but also have other apps open, so Alt+Tabbing to the desired window would take more time.[1]

That keyboard shortcut saves me probably 5 seconds per minute on the average, so ~40 minutes a day, and it's supported by Unity and Windows 7 as well. Adding custom keyboard shortcuts for the app doesn't work, because pressing the shortcut will launch a new instance of the app.[2]

Adding Meta+1/2/3... via the window menu -> More Actions -> Window shortcut works, but there are two annoying problems:
1. The shortcut is forgotten when the window is closed, and you have to configure it again
2. If the app isn't running, the OS won't launch it for you. In Windows, you can launch the app that way.

[1]: KDE will order the most frequently used windows first, but you have to first look and see how many times you have to press Alt+Tab; while with Super+1 or Super+2, you always know which shortcut goes to one app or the other.

[2]: Some apps have an option to allow only one instance, but this is the exception rather than the rule, and even in that case, there will be a noticeable flicker of launching the new instance and seeing it exiting immediately.

Reproducible: Always




Demand for this feature:
* Windows supports it
* Unity supports it
* Cinnamon users want it - https://github.com/linuxmint/Cinnamon/issues/5561
* http://askubuntu.com/questions/813262/which-desktop-environments-allow-switching-among-windows-with-supernumbers
* I've placed a $100 bounty on it