Well-known CyanogenMod developer and Cyanogen Inc cofounder Koushik “Koush” Dutta said in a Google+ post that Android mirroring may be coming soon to Chromecast, according to APIs seen in the recently released Android 4.4.1 KitKat code.
Display mirroring on Chromecast is only available on a PC, and only works with Chrome browser tabs, but Android tablets and smartphones may soon receive a similar feature. However, the mirroring feature may be limited for use with the Chromecast, while other devices (such as Apple TV or Roku) ready to offer similar features to users may not be supported.
Furthermore, the API discovered by Dutta is “not available to anyone but Google and the OEM,” at least for the time being.
The developer has been working on his own streaming solutions for Android devices, whether related to the Chromecast or not. Dutta is already beta testing an AllCast app that lets users stream local content to various devices except for the Chromecast (which isn’t supported yet) – the app is available in beta from the Google Play Store – and is developing an AirPlay-like capability for CyanogenMod 11’s screen recording feature (see it demoed in the second Google+ post embedded above).