Kevin C. Tofel, writing for Gigaom:
Google’s strategy to use the Chrome browser as a desktop replacement took another step forward on Friday. Users of Chrome Canary, an experimental version of Google’s browser, can now associate Mac files with supporting Chrome apps in the Finder. This means that instead of opening a basic text file with the native OS X TextEdit, you can open it with a Chrome app like Text, Caret or Simple Text.
Interesting move from Google, but not a surprise either. Google has been building an ecosystem of apps on iOS for over a year, and it's only obvious that they're going to continue extending the effort to OS X, where they have even less limitations.
On iOS, they redirect YouTube links to the YouTube app, leverage x-callback-url for Chrome, and make sure you always use Google apps when opening links; on OS X, the Finder's “Open With” menu makes perfect sense to redirect users to Chrome – especially for Office-type documents.