Bing-powered Address Bar
In Windows 8.1, Bing search capabilities are now built directly into the operating system. You can see this in action in IE11's address bar. Besides giving you suggestions based of previously visited sites as you type (this is dynamic, as it's based on factors such as frequency and recency, not just of the in-use device, but your other devices too), it'll suggest direct links to site sections, those from Bing search, as well as Windows Store app suggestions. It can even give you answers for weather and stock prices.