Apple Maps actually does that too. If you have an upcoming event with a location in your iOS calendar, when you tap the search field in Maps, it suggests the location of the upcoming event right at the top of the list, before you've even typed anything.

I'm not sure the exact rules it uses for this. An event of mine at 2pm tomorrow wasn't sufficient to show it, but I added a test event in 1.5 hours and it showed that one. It might be the same criteria that Notification Center uses to determine when to show an upcoming event.

I don't know if it prioritizes explicit searches in any way, but automatically suggesting my upcoming event's location without having to type anything at all is pretty good.

(Note: I tested this on the iOS 9 beta, but I know I've seen this behavior in iOS 8.3 in the past)