Bing for Android just beat Google Now on Tap to the punch.
 

Microsoft just beat Google at its own game: the company has updated Bing Search on Android with a new feature that analyzes what’s on your screen to bring you useful, relevant information without the need to switch apps.
Google’s promised to offer similar functionality in its upcoming Android Marshmallow release, with a feature called Now on Tap. But Microsoft has beaten it to the punch and doesn’t require developers to integrate any code into their apps for it to work.The new Bing feature works with any app: just long-press the home button and it will read the contents of your screen — images and all — and display related information in an overlay.