Why Books Don't Need Pages

This will into things a lot of people won't care about, but some will care very passionately about.  It's the future of books, and more specifically, the technical and UI considerations of how pages work in eBooks.

The thing that got me was this post on the always-exciting eBook Test.  In particular, this bit:

For example, while held in landscape mode, an eBook reader could display two pages, side-by-side, just like this current online software at The Internet Archive:

Now, The eBook Test is a very