The idea looks good. The concept, I have my doubts. I think the email concept for reading is outdated. Things like Flipboard or Zite are much much better for reading news, why no make it better like those?
That's it. Like Flipboard, Zite and those ones. Much better browsing experience than taping each element. Also, those formats allows you to peak the article without even loading it. To me it's a wonderful experience and many others enjoy that too. I think the old Reader UI is gone.