I've been pinning all my hopes on the coming reader from plasticlogic.
https://www.mobileread.com/forums/showthread.php?t=10307
Been waiting for an A4 reader for 5 years now and this seems to be the most promising one within my price range. Even if it does not turn out as expected a large number of companies are working on this technology and I would expect it to achieve market viability within the next 3 years. Sadly I don't expect anyone come up within anything this year.
