Why is the author comparing the portable music player market with the e-reader market. In no way are they similar so you can't just throw out that Microsoft sol

Why is the author comparing the portable music player market with the e-reader market. In no way are they similar so you can't just throw out that Microsoft sold a million Zune's and the Kindle didn't even come close and use that as evidence of failure. The e-book reader market is vastly smaller than the music player market (which may in itself be somewhat unfortunate). I actually think the price of the Kindle is very reasonable, when you figure in that you don't have to pay a monthly fee for the cellular service. That was a conscious decision made up front to not subsidize the device with a monthly payment plan. There have been many reports to indicate that the Kindle is doing just fine including one recently that the NY Times Best Seller list is going to include Kindle sales because of the large number of purchases.