Visionox has reportedly introduced its latest display development as a "world-first", as it is a type of AMOLED designed to reduce power consumption through attaining ultra-low refresh rates, but does not rely on typically high-end LTPO technology to do so. This new display panel type could thus allow the smartwatches of the future to feature always-on displays at a lower cost.
https://www.notebookcheck.net/Visionox-touts-its-latest-display-solution-as-capable-of-bringing-LTPO-2-0-level-always-on-modes-to-next-gen-wearables.608997.0.html