Users of Android's recent editions have been exposed to Google Now, the "before you know you need it" search tool.
Google Now tries to look ahead at your schedule and physical location to let you quickly access the most relevant results -- traffic for your commute, flight schedules for your trips, local restaurant recommendations and the like. G-Now uses a card metaphor to pop the necessary info right onto your device screen with minimal intervention.
While Siri can handle quite a few of those search chores on iOS, she's not exactly the anticipatory type. SRI's recent Tempo calendar app gives you some of the same halo of savvy around your schedule,