I read that review too. I think Mr. Mossberg places too much weight on the download convenience of the Kindle and not enough on the screen superiority (at least from I've seen) of the DR800.
And from that same article:
I found the Irex much clumsier to use than the Kindle and, because of that, I still prefer the Amazon device. For instance, the Irex requires a stylus—an ancient and fading navigation device—for some operations.
I think a person of Mr. Mossberg's maturity and reputation ought to think twice about calling anything else "ancient and fading".