I just continued watching the second season of "Love, Victor" on Hulu and noticed that my receiver went into 5.1 mode. I checked some other content and yes there finally is 5.1 with the Hulu-App on AppleTV. 5.1 with Hulu was supported on other devices for years, but for some reason wasn't available for AppleTV. Glad it finally changed! I'm pretty sure this only happened today. I thnk yesterday it was still just stereo.