It’s a matter of preference of what you think is cool.

I think this case is cool. You don’t need to carry two separate screen devices. Just flip the phone over and you’ve got an e-ink display.

Another example would be MM720 mouse. Most people think Logitech or Razer mouse are cool but my vote goes to MM720 because it has better quality switches and ring finger rest. 🤷‍♂️