I second or third this idea. I use a nice PDF reader, but could get so much better user experience from an ePub reader like iBooks. An ePub reader keeps my last read page, syncs seamlessly to all of my devices, I can zoom in/out and move to the next page without having to resize again, the list goes on.
If anyone has suggestions on how to get a PDF reader to sync between all of my devices and keep my last read page, I’m all ears…