In general you aren't going to be very happy with eink and interactive features. Most touch screen discussions talk about lag. These units may not have the processor power to handle real-time interaction, but I believe the biggest culprit is the e-ink screen.
E-ink is fine when you want to refresh the entire screen at once and display a static page of text. Menus, typing, touch-screen inking, and other interactive things seem to be less satisfactory.
It does appear that the newer screen controllers that let you refresh just part of the screen at once help with the ability to do more interactive work. But I really don't feel its ready for primetime as a full featured PC. My Kindle2 is an ebook reader, and I love the way that I can also use it to browse the web in emergency. However, if I purchased it for its web capabilities I would be disappointed. Its only because I view them as a bonus, that I consider these capabilities a plus.
A lot of folks looking for more full featured book reading and web/pc functionality are waiting to see what PixelQi delivers. They are promising a screen that has a highly readable Book mode and that can change to a color mode that can refresh easily to handle interactivity. However, this PixelQi screen is basically a modified LCD. If you have problems with laptop screens or LCD desktips then I'm not sure if it will fix your issues. It really depends on what your problems are, and on how the screen adapts for its high contrast ebook mode. If the issue is the backlight, then you might be in luck. If it is the constant refresh versus the static display of eink then you might have issues.
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