Integrated Application Search inside Gnome Shell is one more exciting feature we will see in Gnome next release in March, 27. The work has started from 3.5 cycle and Gnome Shell can already search for our cloud files (ie G. Docs).
The goal is “Search in style from the Activities Overview”, and searching will be done through all the data of Gnome Apps, cloud or local stored.
Tentative Design
There isn’t something new in here, other that this feature jumped as a feature for Gnome 3.8. If you have missed our previous note on that, it will look like something as:

This is just an early design, it might (and will) change during the development!
As you can see, all search results are provided by individual applications, with the exception of Software and Web browser Applications that are both treated in a special manner meaning that they are always available as a means to launch searches.
The results will be limited in a manageable number (3-5), but there will be an option to “see more”. You will be able to launch a file with its associated Application.
Result Order
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Individual Applications will provide algorithms(zeitgeist?) to order the results according to frequency/recency/favorites, while in the same time will look in various metadata.This is work in progress and there is already a repository: http://git.gnome.org/browse/gnome-shell/log/?h=wip/re-search |
Learn more at Gnome Live!
Design/Whiteboards/Search and ThreePointSeven/Features/IntegratedApplicationSearch
*always check on Gnome Live because features daily change!

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