Why don't ePaper-devices do apps?

In article , wrote:
In article , Charlie+
wrote:

On Mon, 23 Jul 2012 22:34:04 +0000 (UTC), wrote as
underneath :

We know that epaper takes half a second to update its
screen, so it can't keep-up with keyed input.

But can't a method be found to buffer a [selectable]
number a chars, between screen updates. Or some
other solution.

And why shouldn't it have an email-client and a
'lynx-like' http-fetcher?

I assume ePaper is the same as eInk? my Kindle does
webpages etc -slowly and small-ly but you can use
it at a push!
C+
But can you write and edit text?

==TIA.



Sure. It helps if you have one of the models with an actual keyboard, of
course.
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