I'm going to tell you a story. Don't worry, it's rather short, and it will be very easy to follow. Early this year, Google bought Nest, a company that makes cool thermostats, for $3.2 billion. A few months later, Google started to sell said thermostats in the Play Store. Now those thermostats are being joined by a nifty smoke and carbon monoxide alarm called Nest Protect.
As a smoke alarm, Nest Protect isn't quite as exciting as a thermostat.