I can't comment on Whitta's movie skills (haven't seen Book of Eli yet), but his post on the first page completely misses the point.
Reading on an iPad is NOT IDEAL. The screen is bright, has glare, and WILL hurt the eyes after a while. Plus, the battery life is not as good.
E-Ink is a different beast. It's remarkably close to paper and no strain on the eyes. Whenever someone pimps one of the iProducts or a smartphone over a dedicated e-reader, that is a very clear sign that they don't know what the fuck they're talking about.
No, the Kindle or Nook can't play games or do your taxes. But if you want an amazing reading device, well, they DO do that.
edit: Kindle owner here, BTW. Love it!