That was a great article. I might just have to check out that author's ebooks.
I prefer my dedicated e-Ink reader, like many others here, and I pretty much gave up on print books, although it probably took me five years to make the switch (2002-2007 or thereabouts). As I get older, I find it hard to imagine going back to books I can't change the font size on.
I agree, however, that if somebody came up with a way to make a tablet have the battery life (and weight) of my eInk reader, I'd be glad to narrow down to a single device.
I think for lots of casual readers, the phone (or even tablet if they have one) will suit them just fine. Even $50 for a dedicated reader is an expensive choice for a 1-book-a-year reader. They might be happy to inherit an older model from one of us more enthusiastic readers who like to upgrade now and again, though.