Retro-Futurism

Bringing back the old-school. Recently I came across this post on SlashDot, where this guy had turned an old NES controller into an optical mouse. Along with bellbottom jeans, worn jeans, tie-dyed tshirts, emulated console games, and text-adventure games, there is a lot of retro-futurism going on around us. This exists in film and television as well, like in the Matrix, and Dark City, Blade Runner and the Truman Show. Is it fashion or nostalgia?