Is there a generic name for interfaces that use this paradigm, something that would encompass Mac OS X Quicksilver/Alfred/Launchbar/Spotlight search, Chrome's Omnibox, FZF on the command line, Ctrl T/P in IDEs, etc.

I really like it and would like to adopt more things that use it. "Fuzzy finders" maybe? That doesn't really capture the autocomplete, hotkey to launch part of it which makes up the full flow in my mind.