Performance, reliability and security are all improved in the coming update.
The Chrome Releases blog has announced a scheduled over-the-air update for the Chromecast will begin pushing out in the next few days. The update is said to improve reliability, security and performance — things that we always appreciate when they are at their best.
The best part of the news is that you'll never know you're getting the update, and that you don't have to do anything to get it. Like Chrome OS on any of the Chromebooks, the update will be downloaded and applied automatically without telling you or needing your intervention.
Some of us like to know every little version bump, but for the most part seamless updates are appreciated by consumers. Those that want to know can read Android Central, everyone else can just enjoy the enhancements.
Source: Chrome Releases