If it's a 4k TV it also has more pixels and better refresh rate. And color. But for that extra $2360 you get the feature that your image is still there when the power is off. I expect that feature would be substantially more costly regardless of the patent holder's extra.
EInk doesn't have a backlight. So it's easy to see in glaring light. It's also not disruptive if so, you want to use it as a digital picture frame and you don't want light from the display bothering your eyes day and night.
EInk is a more peaceful display technology, and some people put a lot of value on that.
> you get the feature that your image is still there when the power is off
How is that a realistic feature? Who is losing power and being happy that they spent a few thousand more, nearly 40x, than a 36" photo quality print, just so the image can remain while their lights are off?
As the person you are replying to clearly stated, it has nothing to do with drawing power from a wall socket. It’s about enabling new uses that work on battery power that can last for months/years instead of minutes.