Like Gmail prior, it honestly seems like Google Cast has been in beta forever. Well, it's actually only been two years according to Google, and that test period ends now. Cast is directly built into Chrome as of today and anyone can use it without having to install or configure additional add-ons or extensions. Now everyone can throw individual browser tabs to your Chromecast -- or even your desktop -- in addition to services like Netflix or Google Play Music.
Maybe now that the software is out of beta we can get a totally new Chromecast that has stronger innards all around. Maybe. The folks who Google says watched and listened to 50 million hours of media using the HDMI dongle in the last month would probably appreciate it.