"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Begins Countdown to 50 Billion App Store Downloads
Apple's most recent contest was for 25 billion downloads back in February 2012. This time around, Apple is also giving $500 gift cards to the next fifty people to download apps after the fifty billionth.
Apps have revolutionized the way we play video games, consume news, do business, educate, communicate, create art, and so much more. As we approach 50 billion app downloads, we'll be awarding a $10,000 App Store Gift Card to the lucky customer who downloads the 50 billionth app, and a $500 App Store Gift Card to each of the next 50 people to download an app.The download count currently stands at just over 49.2 billion.