What Windows 8 OPERATING SYSTEM has that a simple 3-min install BROWSER Google Chrome doesn't have?
I can think of two things. The Video app that can play videos that are already on your hard-drive, and the clunky Music app that can play music that you already have on your hard-drive. Apart from that what's new?
You press the windows button on your keyboard to access the metro interface. You click on the Google Chrome browser button to do a similar thing.
Chrome web store is already matured with apps. You already have more than you need, starting from themes to high-performance games. All the apps you have installed once will automatically be synchronized across all the chrome browsers that you have signed in with your Google account. Seriously, what's new on Windows 8?