Ever felt that some of those autocomplete suggestions Google provides just aren't quite something you would ever search for? Well, apparently Google did too as they now have announced they will be improving Gmail search's autocomplete function. The updated function will have tailored predictions based upon the e-mail in your inbox.
These autocomplete suggestions should be a bit more useful to users than the current system. The system will function similarly to how Gmail's advertising system works. The advertising system reads the subject and contents of e-mails in your inbox and then custom tailors ads based upon what it found. Google stresses that no humans read the data.
It's likely that the autocomplete will use a similar system, if not the same, as the advertising system. I'm sure that some will not like the additional use of what is considered private data, but at the same time, it is already being used for advertising and other purposes. This use of private data should at least improve the user's experience.
English language users will see the update first over the next few days and then it will gradually roll out to others over the next few months.