I don't think you do want motion blur, as you don't know the direction in which the user's eyes are tracking. When games and films do motion blur, they know where they expect the viewer's attention to be, so blurring things they won't be tracking improves the look (especially at the low frame-rate of films). But if you happen to track the moving page, and you are likely to, and it has blur added, then it will look worse.
Look at phone interfaces; even if you scroll fast, they don't add motion blur, and on high framerate and/or low-persistence displays, you can read things while it scrolls.
I have done some testing around this (motion blur while scrolling) and can confirm that motion blur is not practical for scrolling. It “looks nice” and is a nice effect, but makes the text completely unreadable while scrolling.
If you have access to a Mac, the easiest way to check for your self is to add a CI motion blue filter to a tableview’s layer’s filter property (you can change the strength of the blur based on the speed of scrolling if you would like).
Look at phone interfaces; even if you scroll fast, they don't add motion blur, and on high framerate and/or low-persistence displays, you can read things while it scrolls.