I'm pretty sure there's been research on the psychological effects of backlit screens versus paper. So the comfort level alone could be enough for "overcast" t

I'm pretty sure there's been research on the psychological effects of backlit screens versus paper. So the comfort level alone could be enough for "overcast" to eschew the Kindle. It'd be different if these stupid companies would make color e-ink display readers, because then your argument would be very apt. But as it is, you're completely ignoring the technical detail of the backlit screen that modern e-readers all use.