I don't understand. The android stick is way more powerful than a Roku with maybe hundreds of thousands of available apps and certainly a huge selection of camera apps. In contrast the Roku we have is very slow like for Netflix and huge in size compared to the mini Android computers. I just plugged it into a TV on the back, unnoticeable, no power cord, just plugs into the HDMI port and USB port and done, very responsive like a good tablet or cell phone and cheap. I would get it instead of a Roku even if I didn't own a camera.
My understand with Chromecast is displays Android from an app on your Android phone. Can't you run the Chromecast app on the mini Android? Seems like amazing device, after all, why plug the Android device directly into the TV when you can buy another device that not only wastes $35 but adds an extra layer of complication and electric use to be in-between or do I misunderstand what it does?