As a distinction for Chromecast Only media players and 'Home' devices. Matches to the usual Chromecast logo, which implies a screen.

Good start! The wireless part of the icon and the speaker aren't aligned to the grid and there should be a 2dp cutout between the end of the wireless part and the speaker. Could you address those two issues?
Here's the fixed version:

Looks good to me - sorry I wasn't to get onto the changes myself sooner.
Glad to see this got added to MDI. Not sure why I wasn't credited though.
Once you hit 5 icons added to the library, open an issue and we'll add you as a Contributor, reassigning those 5 (or more) icons to you.
Most helpful comment
Good start! The wireless part of the icon and the speaker aren't aligned to the grid and there should be a 2dp cutout between the end of the wireless part and the speaker. Could you address those two issues?