I agree, refresh rate is an issue that is more important than energy usage, colors or life time (apparently e-ink dies quicker when viewing videos).
I'm just experimenting with a USB-based external e-ink display to see if it is capable of reading/writing/editing technical documents (started last week), using a device with a 50% more affordable price point.
My first impression was I needed to increase the font size to be able to work. Let's see how it goes.
Video forces e-ink screens to redraw the scene 30 times per second. For static text like an ebook, the display redrawing the scene far less frequently, maybe once every 30 seconds, if that's how long it takes to read a page of text.
I'm just experimenting with a USB-based external e-ink display to see if it is capable of reading/writing/editing technical documents (started last week), using a device with a 50% more affordable price point. My first impression was I needed to increase the font size to be able to work. Let's see how it goes.