Comment by mmkos

I can see this unlocking a new class of card games. Instead of buying a different set of cards, players would only need to buy one set of these e-ink cards, which could be used across a completely new marketplace of card games. They have the benefit of being more interactive and thus more immersive/engaging, albeit they seem a little unwieldy (the form factor could improve to make them thinner).

Can you file a patent for something like this? If you can, then I would explore that option.