Like this:
I originally had them up in our family room, and my wife said that I couldn't just put up posters, they had to look like works of art. So we framed 'em.
I found the frames at Hobby Lobby at a discounted price, then bought some framing mat and a mat cutter for that angle. It was kind of a pain, but once done very worth it.
Framing posters always makes them look more impressive than just a poster. I like the idea of the poster in that coffee table, but I can see how it would be hard to find ones with the right dimensions.