Now, you can cast from Chrome without any extensions
In the past, you needed to download and use Google’s Chrome Cast Extension to cast from Chrome to ChromeCast which was actually stupid. However, finally, they have equipped the cast function directly into the Chrome.
With the Chrome 51, you can find the cast setting under the drop-down menu. However, it only allows you to cast without being able to change anything including settings like streaming rate 0r screen resolution.
Even though ( with this update ) there will be no need for the cast extensions, still it will be available in the store and still it will be working.
Also, with the new update, hangouts got the ability to receive Google casts. First being spotted in May as a beta, now it is officially rolled out as a stable release.
One user noted that;
I have this working (though buggy) in Chrome OS v52. My workplace uses Hangouts for our meetings. If I choose the Cast option in the menu it finds meetings in my calendar and lets me share my tab or desktop to the hangout. It’s similar to screensharing in a Hangout but there’s no audio transmitted. One use case is if you’re in a room set up with a Chromebox for Meetings and want to share your screen with everyone, without having to join the Hangout.
Chrome 51 is already out but not everyone can use it at least right now. If you are one of the users who does not have the cast function, just give it time.