I really love "retro" style. But specially those that use actual hardware to add cool effects: Geometry Wars, Rez HD, Darwinia, N+, Flow... Tron-ish style in general. Thing like this:
NES style, isometrix pixelated games... When we are in those "ages", those look are hardware limitations, but now that limitation becomes in art style, Pixel Art, like many other thindg.
The same happened with first 3d games. We got "Polygonal Art". We can see those used in films, and TV spots, when they are speaking or representing videogames.
In general: it is cool, fast, cheap, and good looking, and has many fans... very good for indie game developer people