So you are going to argue that the reason people get eyestrain with LCD devices is the angle being fixed as he did? Wow.
I have read books on virtually every kind of device available and the only one that has approached reading on paper is e-ink.
I am the proud owner of a Sony Reader. And I very much enjoy the form-factor and the display. I can easily read books on the screen. And the device is the perfect size for this activity.
But it isn't as great as you say.
Firstly e-ink is not black on white like a book - but dark-grey on lighter-grey. Like printing on grey paper. The contrast is much worse than ink-on-paper - which makes reading in low-light difficult. Worse than a real book.
E-ink does not like bright sunlight either. If you update a page in full-on-sunshine you might notice that the text is faded.
Text display is good, but any photos and even diagrams are compromised by the limited display of grey-levels.
E-ink has no backlight. It has to be front-lit.
E-ink is *very* slow. There's no possibility of a dynamic smooth interface (like the iPhone) with e-ink - you are pretty much stuck with a page turning metaphor. No scrolling or dragging is possible.
E-ink is not going to be color - ever.
Now contrast this with reading on the iPhone.
The iPhone is much too small - for a full-sized page.
In direct sunlight - the screen is not bright enough. Even worse than the fading e-ink. And the battery life is hours rather than the multiple days the reader can manage.
But on the plus side, the display is capable of rapid smooth interaction. Which means navigating and browsing content is much more effective than the clunky press-and-wait interface on a reader.
The legibility of text is comparable. The ppi density on the iPhone is 160 versus 166 on the Sony. Yes the Sony is paper-ish, the iPhone is screen-like.
But you can use it in a darker room.
And it's much more suitable for documents containing diagrams or photographs. Or even animations.
What impresses me most about e-ink is the battery life. But if I can get a reader with 6 hours usage, and could get magazines and websites, I would much prefer a responsive LCD display to e-ink.
C