And now we've moved totally beyond what was being discussed in my post which was the feel of reading a pbook and knowing how far along you are intuitively as compared to reading an ebook that has a completely different feel and intuition about reading.
I agree the display bar can be similar, but that is not displayed constantly in the kindle app or in other incarnations of the kindle (I'm not certain of this as I don't own them all like Harry
) But I do know the progress bar is not displayed contantly on the Kindle Fire which I use for much of my ebook reading atm.