This is absolutely huge and I think some people may be missing its significance.<p>Back in the 90's Windows had a huge monopoly due to network effects - developers would target Windows because it had the greatest number of potential users. But now they will target Android for the same reason because it can run on Windows, Mac, ChromeOS and Android smartphones.<p>This "Android First" model will affect several major areas, all in Google's favour:<p>1. It strengthens ChromeOS over Windows.<p>ChromeOS is already a strong player in the education and low-price sectors. Having a huge range of Android apps will make ChromeOS far more attractive and grow its market share. Moreover if corporate, boring-office-CRUD developers switch to an Android-first model then it will very quickly kill Windows.<p>2. It strengthens Chrome over Firefox and IE.<p>Many apps will now <i>require</i> the Chrome browser to run. Oh, you are running Firefox on Windows and want to play that cool Android game your friend told you about? Just switch to Chrome and sign in with your Google account! Again there are network effects - the greater Chrome's market share the more willing developers are to create Chrome-only apps.<p>3. It strengthens Android over iOS.<p>Android has about 85% of smartphone market share, but many startups are still undecided about an Android-first approach because a single Apple user generates far more revenue than a single Android user. Having Android run on desktops will push some startups off the fence in favour of Android-first. A few developers switching from iOS to Android doesn't sound like much, but if there are a ever a critical mass of Android-only apps it will quickly kill iOS. Apple should be worried.<p>4. It strengthens Native over Web-app development.<p>Ok this isn't a huge benefit for Google, but it is significant for developers. Back in 2005 every startup chose browser-based web apps as their target platform. The rise of smartphones has pushed the pendulum back towards native development, but desktops have remained the preserve of web apps. Many startups now develop both a Web App and Android version of their product - by dumping Web App development startups will now be able to (a) save costs; (b) produce a desktop app that has native performance and better access to Google Play Services.