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E-ink just costs a lot, and performs low, but it is the best energy saving technology and is best viewable outside (even better than Pixel Qi's technique).
I think it's far from dead; only Pixel Qi has a different type of screen for a different audience. It uses more battery than E-ink, and is less suited for reading books.
I'm getting impressed if Pixel Qi is able to manage to get processor in a halt state, though I think that would be pretty impossible with a computer, since moving images like eg: the movement of the mouse on the screen, require the processor to be active.
Most processors downclock to 800Mhz after which they become very inefficient. Meaning that the processor speed may lower in clock frequency, but it would barely save some milliWatts.
this halt state which they try to reach on a laptop would only benefit when reading books, and nothing moving is on the screen.
Also, the screen currently is like TFT/LCD, they yet need to get the improved resolution of the OLPC screens working. E-ink already works with this type of resolution. So you'll end up with the grain of mininetbooks.
There are still disadvantages about Pixel Qi's technology compared to E-ink; though there are many advantages like moving images, more B/W grey tints, colors on backlit, and B/W with utter minimal colors on non-backlit.
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