Android 5.1 vs Android M - Google Now "On Tap"
Google Now is one of the best features of Android, and continues to be more powerful and useful than ever. It's an assistant of sorts that can do all types of things. From voice commands, settings reminders or alarms, sending messages or making calls with your voice, to even searching your Gmail and sharing incoming flight information or track packages all automatically for you.
However, with Android M you'll still have all of that, but a new feature called Google Now on Tap will be coming. Long press the home button and instead of opening Google Now, you'll get half the screen being temporarily used by Google Now. This is almost like multi-tasking. And will read whatever is on the screen, use Google Search and Google's knowledge graph, and figure out what's on the screen and instantly share information about it, similar to Google Now cards, all without ever leaving the app you're in. Quickly get information about a location you plan to visit, a movie a friend wants to watch, and more. Here's a demo.
This looks to be one of the best new features of Android M, but it's currently not working on the Android M developer preview. Our screenshot shows Google Now on Android 5.1, and a preview of what is coming in M, because the feature isn't supported yet in this release.