There could be different design for the left and right pages of the book.
Yes - this is possible with data templates.
Can't this already be done with Data Templates (i.e. different Left & Righ pages)?
ManniAT's idea would be nice, but the most critical issue for me at this time is UI virtualization.
Important - this should be able to reflect if "there are pages".
Like with a real book - if you look at it you see (even without closing it) if there are pages
left to turn.