The S900 is MediaTek's newest SoC that is custom-designed for smart TVs. It is powered by Cortex A-73 cores, and is compatible with the HDMI 2.1a standard, allowing it to deliver 8K videos at 60 fps and 4K content at 120 fps. The chip also uses machine learning to improve picture quality in real-time.
https://www.notebookcheck.net/MediaTek-s-8K-ready-S900-chip-is-ready-to-hit-smart-TVs-worldwide.470181.0.html