One of the new devices entering the space is from mySpark Technologies which has an Android-based tablet with a stylus and capabilities designed for textbooks. Rullingnet is introducing a device for toddlers(the Vinci Tab).
These devices will compete, of course, against existing players, such as Kno (which is rumored to have their hardware platform for sale), Entourage Edge (with its dual screen device), and, of course the iPad.