Anyone who wants to search for their own content in the Google universe quickly gets the possibility to do so with a new tab in the navigation on Google.com. Under “Personal” (a little hidden under the search options for “more”) you will now find the option to search content in your own Google Photos, Gmail and Calendar at the same time.
Other apps (Docs, Drive, Keep, etc.) are not yet included, but maybe this will follow, because only then will the function really be useful, at least for all those, all these Google features really Strongly.