Evince is designed primarily to read PDF, PostScript, DJVU, multipage TIFF and DVI. It can also read some other formats. Since it ships with GNOME it can be considered the primary reader for that desktop. It has also been adopted as the primary reader for the One Laptop per Child (OLPC) initiative whose goal is to provide inexpensive laptops for children all over the world. They have designed their own Linux based hardware laptop that is ruggedized for child use and sells for about $200. Since its primary aim is education one of the central pieces is the ebook (document) reader. Their feeling is that most documents will initially be scanned images or OCR documents from paper sources so the thrust is to provide support for this kind of material.
DJVU is an encapsulating tool to create highly compressed documents from individual pages. It is expected to provide a major source of books for OLPC and a natural fit for Evince.
Evince will also be shipped on the Touch Book.