At this point you can’t throw a rock without hitting a 4K, HDR-enabled television, at least if you’re throwing rocks in an electronics store. Why are you doing that? Cut it out, you’re gonna break something. Anyway, if your TV has both 4K resolution and HDR capability, now you can use HBO Max to the fullest on your Chromecast.
HBO Max on Chromecast and Android TV is Ready for ‘Wonder Woman’ in 4K HDR