displays
Looking closely it is possible to tell a difference of contrast between Kindles one and two. That recalls the thousands of differences in grades of paper. Those differences, subtle and blatant, adverse and optimal, are overt and we assimilate them, but they also express a difference between screen and paper display. Both are experienced in an analog reality where paper display is physically embedded and the screen display is an instrumentation or read-out.
screading
Reading applies to interpretation of gesture, weather, music, pictorial, video, wines, and a great variety of kinetic and sensory experience. Nothing wrong with the generic meaning or its wide application. In my view, the useful topic here is taxonomy of distinctive kinds of reading. And, perhaps, different kinds of reading are interdependent and tend to augment each other. The careful and expressive textual descriptions of the experience of wines or cheeses comes to mind.
A distinction of screen reading is a delivery format that differs from street signs, printed paper or movie captions. The delivery is transient as the screen is quickly redrawn and re-access is compromised by changing and expanding search results and keyboard error. Screen navigation is also devoid of place or time ques or kinetic manipulations that assist orientation in larger works. The screen reader is also separated from content by encoding, software and electrical and radio transmission. Screen reading is highly mediated.
So the needed descriptor has actually been realized when the format is used as an adjective; screen reading, print reading, musical recital or recitation reading, palm reading and so on.
nook
The quantities and varieties of electronic reading devices are expanding rapidly. Soon there will be as many different devices as there are different paper books. When this happens equivalences of paper and screen will be more easily evaluated since a page turned here will be another there.