For me the main benefit of EInk, besides the daylight viewing, is battery life. How does your epaper compare to EInk or an iPad? I realize it wont be as efficient, running at 60fps, but I'm curious if it's that much better than a regular tablet display.
E-Ink is definitely not efficient for "animation". It does not consume power in static context being bistable, but switching dot state is very costly. So it all depends on the proportion "static:updating".