Today, Google gave its Search app the ability to find your files stored in Drive with a simple voice command. Just say "Search for [whatever] on Drive" and the app will pick it up.
The search bumps you out to the Drive app, so this is really just a shortcut. You can't actually filter the files from the search results like you can with apps. But, it's still handy. The update also lets iOS users upload files to Drive from other apps, and both platforms can access My Maps data within Drive.
Google Drive [Google+]