I am sure Adobe extracts a huge price for devices that use pdf. That's why you can't find an cheap laser printers with pdf, and might be why the new Amazon book reader doesn't do it either. So perhaps pdf is the ultimate Trojan Horse?
So is this the year that book readers take off? I doubt it. Perhaps one day, they will be colour e-ink in a 100 gram flexible package, equipped with wireless. Will this be enough? Most likely not, since the book sellers, such as Amazon, will want to sell downloads at a price comparable to hard-media, much like current music cds, and movie downloads. Eventually, there will be general-purpose computers that can be used to read books, and people will find a way to download for free. No pdf restrictions there!