“Chrome Apps work offline, update automatically and sync to any computer where you're signed into Chrome, so you can pick up where you left off.”
Trent Apted and Jack Hou on The Official Google Chrome Blog: “Starting today, you can access these apps on any computer with Chrome, including Mac. Check them out in the “For your desktop” collection in the Chrome Web Store. [...] To make it even faster to find and launch your favorite Chrome Apps, we’re also releasing the Chrome App Launcher for Mac. Just download a new Chrome App and you’ll see the Chrome App Launcher in your Dock.” Will be interesting to see where this goes.