Shure, Dual Screen where you have 2 Pages is a nice Idea, but I prefer to have it the normal E-Ink Reader way whit Page Change Buttons, the big difference between an normal Book and an E-Book is that you would change the Page by changing the Paper Page, which don't work here ..
I think I stay now whit the Boox Go7, its a nice Device even though its a bit slow some times, I was thinking yesterday of getting me the Boox Palma 2 Pro which is the size of an Smartphone, but its only do the stuff the Go7 can too
An Opensource Reader where nice, but the issue there is that you can't have your normal Reader Apps, while on an Android Based like the Boox Go7, you have the whole Android Store whit Apps like Kindle, Swoosh (for Comics), etc, also I can use the Reader for Productive Stuff as its also nice for Note Taking..