Thanks for all of the answers. They're definitely putting my mind at ease on this subject. I did read an article about the future of 2D gaming from gamesindustry.biz, where the author interviews a number of game developers. They're all very positive on the future of 2D in general, and are seeing a revival of the medium. They did also discuss the value perception, which all besides one thought did not contribute negatively to the value of the game.