Dynamic Sidebar Widget Display

Anyone know if such a thing exists?
I'm looking for some kind of plugin that will auto-fill /show / hide Sidebar widgets based on the body content's height.

eg:
1 paragraph body content (short page) will have the first of 10 sidebar widgets displayed, but the other 9 hidden.

50 paragraph body content (tall page) will display all 10 sidebar widgets.

Open to other suggestions as to how to keep the Sidebar and the Body content's height in balance.