Will the upcoming Amazon Tablet feature two screens, E Ink and color LCD?

There's a (unsubstantiated) rumor saying that the upcoming Amazon Android Tablet will feature two displays - an E Ink one for reading and a color LCD one. The tablet will feature the E Ink on the back of the device, and will come with a case to protect both displays.

This seems rather unlikely to me. I think Amazon will be wise to keep the e-reader and the tablet devices separate. According to the rumor the tablet will launch in August, so we do not have long to wait...