I've seen some very recent niche tech demoing fast-refresh e-ink screens but pretty much everything until now has required a noticeable flash to clear the entire screen on update. Which is fine for reading books but not for quick animating in an action game.
Most e-ink displays do not refresh faster than the original GameBoy which was 60fps.
Most e-ink displays do not refresh faster than the original GameBoy which was 60fps.