Few points:
1: I love eVersions of printed media
2: Whilst it's the best we have right now, I'm sure other better devices than the iPad will come along in time. Perhaps larger flexi dieplays?
3: I think media you buy now should be tied to YOU not the device, so in a couple of years when you buy the Microsoft flexi display book reader, you can again enjoy your book you buy now on the new display.
4: I do not believe off the cuff comments about how little making, transporting and other mark-ups of physical book are so small an amount as to make no difference.
We're heard for years how expansive this side of things is, and how eVersions would reduce the cost, but now we are here suddenly that old argument is forgotten and now it's expensive to host on servers and printing presses, lorries etc cos nothing. (funny that isn't it)
5: For this above reason I think most people will expect an eVersion to be cheaper, especially due to the drawbacks mentioned in earlier posts.
6: I don't expect something for nothing, but with the easy mass audience right there, without any effort, if priced right they will sell loads. If they price them high then I hope they will fail.
As with apps, the captive market is massive and growing all the time with virtually no outlay on advertising needed. Set the price low, get people onboard who are happy with the low price and make lots of money and people happy.
A UK Newspaper sells it's eVersion for around half the printed version.
Ok, you can't use coupons, you can't do the crossword, but the price is right so it's very popular.