Oh, come on.... ePub 3 was released more than a year ago! What the hell is the industry doing? They should be issuing updates for every device that they already sold. Yeah... except that they all have a "wash, rinse, repeat" business model. Why would they keep supporting older e-readers with new firmware updates that would support newer revisions of the ePub standard? Fricken society... There aren't nearly enough trash piles with consumer junk on this planet?
I would be interested in an Android e-reader (e-Ink screen). That way I wouldn't have to worry about ePub 4.0 or 5.7 or whatever comes out after that.