You can already side-load Android apps on ChromeOS, as well as with Chrome on other platforms. All you need is the ArcWelder chrome extension, which I'm pretty sure is provided by google themselves, to package up an apk into a chrome app: https://chrome.google.com/webstore/detail/arc-welder/emfinbm...
This is not game changer. It is exciting and might help grow the Android ecosystem. I just hope Google learned from the Honeycomb fiasco.