I'd say those are pretty significant advantages for someone who wants to use it as a reading-only device. It's nice to take the kindle on vacation and read out on the pier in ultra-bright sunlight and charge it exactly never.
It's a matter of taste, as evidenced by the success of both eInk and LCD devices on the market. For me personally, I think the improved readability is well beyond superfluous: I regularly bring my Kindle to the beach and read in direct sunlight, a feat that's not possible with other display tech right now. Plus I can bring an eInk device with me on holiday and not worry about charging it or even packing a charger is a win in convenience.
Someone pinch me when PixelQi becomes mainstream, or Samsung does something with their Liquavista purchase, or maybe when Mirasol shows up in the market.
I don't understand why we need color computer screens anyway. I'd much rather have 3x the resolution than 32 million colors. (Have you ever printed source code with a2ps? Much easier on the eyes than color-based syntax highlighting, but still gives you as much information.)
That said, I will immediately buy the next Kindle if it refreshes more quickly. The current update time is fine, but it could be better.
