Remember they are rumored to announce their VR headset in January. Some integration and compatibility with any games or apps would make the most sense.I still think we will discover some hidden capabilities once we see a few tvOS updates. VP9 on gen 2 4K wasn't known immediately. Obviously the greatly increased storage along with the A15 being metal3 compliant is one such gem. See this pdf. (it doesn't mention tvOS, but Apple Arcade games could be using that)