Hank:

I don't think you are correct about the price points for 4K type monitors. Its pretty easy to find 24" PC monitors that do 1920x1200 for under $600. Using a single 50" sheet would give you enough pixels to do all of the 4K resolutions. Even allowing for extra manufacturing costs and more expensive electronics (to upsize/interpolate 1920x1080), one could probably see this in the $3-4K price range. I don't know if you have seen a 4K picture, but it is pretty stunning (I saw a 4K demo using a clip from the Sound of Music at UCSB - it was the Do-Re-Me hill top scene and you could see the individual blades of grass)

I do think that you are correct about the movie studio issue at least in the short term. Longer term, I would expect that their desire resell 4K versions of their film libraries will lead to a solution.