google doesn't know who your friends are, who you chat with, or what news you care
Just like how Facebook does not know what’s in your email, what directions you map, what you web search for, or what’s going on in your Android phone.
That’s why the two have huge but very different opportunities when it comes to building a personal assistant.
To Be Useful, Or Interesting
Google has a big head start, as it launched Now back in 2012 with tons of functionality, mostly surrounding objective data. It can pull relevant info like flight times and changes from your email, display breaking world news updates, or give you a heads up about traffic between your home and office. Its latest trick, Google Now On Tap, can surface information related to what’s going on in your other apps.