I have a Kindle DX. It's the best reading experience I have. If they made a DX touch it would be the be-all, end-all. But they'll never make a DX again, and Amazon would love to phase out all but the Fires. Because they can sell you more shit on a color LCD that plays movies than they ever will on a reflective display. The conversation has long since turned from "what do you need" to "what can we sell you" because if you aren't growing, you're a failure and your shareholders will revolt. The fact that Apple is now rolling out Adblock is proof positive that what consumers really want is less intrusiveness, not more. I have yet to see compelling evidence that collapsible displays will come to fruition without major innovation. OLEDs are wretchedly hydrophilic and we have no good hard, flexible, clear materials that lend themselves to the abuses that rolling or folding entail. If I had to guess, I'd guess that the next big push will be into UIs that take up less space. I predict a lot of failure.
The kindle reader really pushed display tech in the right direction but the momentum sort of faded. Like you I don't really care for more backlit displays but I love the normal kindle display. I wish it could do color and load webpages normally, I would buy it in a heart beat, especially if it still only refreshed at 1hz so it would have to kill all the stupid annoying moving, blinking flashing shit your see on websites.