On a related note, I recently discovered WoX [1] and I'm pretty happy with it. I think it is an even more convenient launcher: Alt+Space from anywhere, type cmd, ENTER.
With a couple plugins you can type things like "win <TAB>" to select from a list of open windows, "g search-term" to google a term, etc.
The plugins part I understand, but Alt+Space, type cmd, ENTER wouldn't be the same as "windows key, type cmd, ENTER" that's been available for a few years baked in the OS?
Because Win+R doesn't autocomplete the command, other than the history of things you already run. WoX will pickup and do fuzzy completion on all programs of the start menu, for instance.
With a couple plugins you can type things like "win <TAB>" to select from a list of open windows, "g search-term" to google a term, etc.
1: https://github.com/Wox-launcher/Wox