I think this is a multifaceted problem: - Apple TVs as they currently are can run RetroArch and some other more demanding games just fine, though not at full 4K - Game engine developers (Unity, Unreal are most notable) work very hard to add optimization tools for mainline consoles, and Apple has only recently started to really bolster this with the GPTK (game porting toolkit) and more Metal/GPU focus - Ouya and other similar Android standalone boxes have been underpowered for years, and the AI hardware inflation will make this segment harder to get into