I hope Amazon does add the support, but only if they don't have to take away two-column landscape mode to support it. But I won't be holding my breath for split-view support. Amazon has a long, long, long history of not giving a care about what we end users request. If they can add a feature that helps them sell more books, even totally annoying features, then they will. Otherwise we probably won't see much added just because we request it. How many years have we been asking for more control over margins and fonts?