I would love if the screen could take up more space, even at the expense of a little extra thickness.
That actually exists, with even the same CPU but no NFC: https://www.xteink.com/products/xteink-x4
I think that there could be a wider screen if such formats are available. Once we have betavoltaic batteries, the entire card can be screen.
That actually exists, with even the same CPU but no NFC: https://www.xteink.com/products/xteink-x4