For my chromecast app I need a few HTML5 APIs that are available (or stable enough) in Chrome >= 33. But navigator.userAgent when run in the chromecast dev console reports:
"Mozilla/5.0 (CrKey armv7l 1.8.17977) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.0 Safari/537.36"
Does the Chrome/31.0.1650.0 part mean that chromecast devices are running that old version of chrome? If yes can we expect an update in the future?
Yes you can expect an update in future. Btw, the proper place for these types of questions which are non-technical is our Cat Developer G+ community.