I wouldn't buy any device that didn't at least have a way of shutting off the animated page turns. Cutesy graphics like that certainly do nothing to enhance my reading experience at all, I want to get to the next page the quickest, least obtrusive way. To me that animation is nothing more than a battery drain.
As far as it helping relieve some of the strain from older eyes, the reverse color momentary flash common to e-ink is enough for me that does the same thing.
I think we had a very similar discussion not too long ago, maybe Apple wanting to get a patent on their page turns?
Edit: Found the thread:
https://www.mobileread.com/forums/sho...=skeuomorphism