Chrome browser supports it. There's an SDK, so theoretically any device can support it. I own both an AppleTV and a ChromeCast. For Netflix, I use both dependi

Chrome browser supports it. There's an SDK, so theoretically any device can support it. I own both an AppleTV and a ChromeCast. For Netflix, I use both depending on whether my phone or the Apple TV remote was closer to me. For Youtube, no question, Chromecast is far better. Other content, I don't want to comment about since I am not sure what's released to the public yet. I also strongly dislike that AppleTV has a fixed set of channels/apps and no SDK (though it's likely they will have one soon). I can't even remove the multiple channels that I never watch and don't care about.