Today, the fourth beta of tvOS 13.3 has been released to public beta testers as well as developers. Quite usually, betas of macOS, tvOS and iOS stay in beta for a while to be tested for bugs and compatibility issues.
tvOS updates rarely add any significant features, and tvOS 13.3 only changes the way the main banner for the Apple TV app shows content. On the current update, when you hover over the Apple TV app the banner plays a trailer rather than showing your Watch Next queue and some users complained about this, so now Apple has added the option to change the behaviour in Settings.
tvOS 13.3 is on its fourth beta and should be released soon. Stay tuned to A&T Tech for more news on Apple and Apple TV.