The most important news about Android M is how it will handle the way apps get permission to access your private data. That sounds like a humble little technical detail until you realize what a revolution it will be when we can set our own permissions on apps, any time we want. And Chrome is doing it too.
Apps often need permission to access other stuff on your phone to work. What is less obvious is the breadth of information collected, and why it gets scooped up. Vocativ put together a list of common permissions from popular Android apps, calling it a "barometer of what app makers think they can get away with."