If ad-supported approach charts were such a viable business model, there's
no reason they shouldn't exist today.

Has anybody thought of it? Well, probably but there are a few hurdles.
First, the public wasn't always so accepting of advertising
everywhere. We put up with it now. The government has to make the data
available; I don't know if it has. (Does Jepp gather it's own data, or
license the government charts and reformat them?) The market is a bit
limited, both for the advertiser and the customer. But it's there.

That said, if ad-supported approach charts ever do become a reality, more
power to them. Many people do not mind ad-supported products at all.

I agree, so long as the ads aren't abusive. They are on the web.
=That= is the trend I fear.

The point *here* is that there's no fundamental reason why, if performance
is improved, animation would not be possible, nor even desirable, on
e-paper.

Here is where I differ, at least to some extent. Performance has to be
improved a lot for animation on this kind of E-paper to work. The whole
idea is to write once and leave it alone. If you have to write thirty
times a second, that's a big performance hit (put another way, that's a
big additional cost to the hapless user). Perhaps there are
applications for animation that users would want, and be willing to pony
up for, but I fear (a fear confirmed on the web) that the primary driver
will be advertisers, who will find a way to make pages animate with no
recourse, and run down the user's batteries unless they "upgrade". For
a model of this, just look at flash on the web.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.