Other than B&N, Kobo and Amazon. Any manufacturer could decide to release an E-ink android device. Specially after that video demonstration showing the potential refresh rate for E-ink. It could be put to good use. Readers, excursionists, students, Professionals on the move. All the people who need basic e-mailing, browsing, Android PDF support and still have a lot more than 7-10 hourse of juice in the device.
If B&N can put a special version of Android in their e-reader why can't anyone do it with the stock version and android market. I bet they would sell like pancakes.
It's just wishful thinking.