Firefox did add tab casting for the Chromecast to its Android version (https://plus.google.com/+LucasRocha/posts/AJtJ3faZXtJ https://plus.google.com/+LucasRocha

Firefox did add tab casting for the Chromecast to its Android version (https://plus.google.com/+LucasRocha/posts/AJtJ3faZXtJ https://plus.google.com/+LucasRocha/posts/AJtJ3faZXtJ). I'm basically in the same situation as you. I already have Raspbmc set up on my Raspberry Pi, and see little reason to purchase a Chromecast. In my understanding, the "killer feature" is that it's supported by an increasingly large number of Android apps, which don't have support for casting to arbitrary UPnP targets as far as I'm aware.