Back on topic ...
... I'm actually with you on the original point of the thread.
I did think that we'd be in a position by now where I could buy an A4 or Letter-sized eInk device, and I'm disappointed with the way the market has left that particular option aside for the time being. I can appreciate the reasons why this has happened, but it's still disappointing.
Hopefully the market for 5" and 6" devices will grow to the point where larger paper-like screens are sustainable. They may be eInk, they may be something else. It looks like we're going to have to wait for at least a few more years. They'll arrive eventually.
Graham