It's my hope that this technology will be so commonplace that even NORMAL e-readers will go down to that price in the longer run.
For example. I can't begin to remember how many hours I babysat as a teenager to save up for my first calculator (very basic) for over a hundred dollars (and it had gone 'down' in price by the time I could afford it). And I had to carry a suitcase of AA batteries to make it work!
Now you can see them in dollar stores.