4K upscaling is available on every game, on the Series S. It is not limited to 1080p or 60FPS. As long as your TV supports it, you're golden. It's not native 4K,
Best 4K Blu-ray players 2023: top picks for Ultra HD discs | TechRadar
Nvidia's new Shield TV wins the Android TV market with amazing 4K upscaling | TechCrunch
Best 4k Upscaling TV: Details Explanation and Recommendation
Testing 1080p Movies Upscale to 4K on SAMSUNG Q8FN QLED 55 inch TV - YouTube
7 Best Upscaling 4K TVs in 2023
What are 4K pass-through and 4K upscaling? | Sony AP
Amazon Fire TV Cube (3rd generation) review: Amazon's best and fastest streamer | Expert Reviews
Nvidia Shield TV (2019) review: totally tubular - The Verge