I'm not interested in starting a feud with you. I'm merely rebutting your earlier statement:
which is not true.Book sellers everywhere - from Amazon to traditional book stores are reporting ebooks outselling physical books
No, I have sales data which I mentioned. Meanwhile, you seem to be erring further by extrapolating "Amazon" to mean "bookshops everywhere".
From a consumer's standpoint, Amazon is fine. But watch out if it is allowed to become the only game in town, which is its aim (reports about its anti-competitive practices are easy to find). You might say this is normal capitalism at work, but a lot of people have remarked upon Amazon as being unusually vicious in this regard, probably a reflection of its hedge fund origins, and the point I would like to make is that no consumers win from a monopoly.
Many e-readers can read PDF's, but they may have limits as to what they can do with them. Mine (pocketbook 360) for example can reflow the text of a pdf so that it can fit on the screen easily, but some cannot. It means that sometimes you have to page down and page down or zoom in and out to read everything, which can be rather annoying, compared to a proper ebook which nicely fills up the screen - no more, no less.