Lukas Mathis:

So how would you design a piece of hardware that is only used for reading? One where people do a very specific thing — turn a book’s page — hundreds of times a day? Would you remove the physical button for turning the page?

I was also a bit surprised to see the page-turning buttons removed from the Kindle Touch. It seems to me that those two buttons would still be quite useful even though the screen now accepts touch input.

That’s a Good Question