Bing announced a feature pretty much exactly like the Google Now On Tap, which is available on Android M (Marshmallow).
But Bing beat Google to it by releasing their app first. As soon as you download the Bing app for Android, you can use the feature.
Basically, you long press the home button when on a screen and Bing will activate a snapshot search card with relevant data and actions you can take. It is hard to explain, so here is a video demo from Bing on how it works:
Pretty cool, right?
Both Google and Apple and even Yahoo are racing to control this space and it seems that Bing was the first to get it in the hands of real consumers. Google is right behind with Android M. It will be interesting to see how one player can control the long tap over the next.
Greg Sterling has more details on this at Search Engine Land.
App developers wanting in, has to email Bing to request whitelist access. This way they can add code to their apps in order to show on within Bing Snapshots on Tap.
Forum discussion at WebmasterWorld.