Android phones, apps and tablets

Love the idea of Chromecast but not sure if you can stream media from your local devices...think everything has to be hosted in the cloud!

Could have wrong end of stick though...

You won't be able to do this, at least not at the moment. They've released the SDK though, and people have found that the device has DIAL (DIscovery And Launch) stuff built in which is interesting. I don't know too much about DIAL, but I believe it gives certainly some level of AirPlay like abilities.