[Erlich_Bachman]

It sort of exists, if you can manage with some small screen (there is no 22 inch screens like that).

Here is a 13.3 inch e-reader which you can also setup as a secondary screen (HDMI input), and connect to any computer as an extra screen: https://www.youtube.com/watch?v=1J3oemOfPlk or https://www.youtube.com/watch?v=sCnPMKvXWas So you are getting both a fully-fledged e-reader and an extra screen.

[eltoozero]

An Android based e-reader no less, the form factor is wild and the price point is super high but damn, this is cool.