I think that classic pixeled 2d has its value, but these days everything seems to need to move in a 3d world. That's perhaps what killed those 2d gfx in recent times, not their quality but their application became extinct. I'd say, do me a 2d game with those gfx any day over a 3d game. It's not just the 2d gameplay that appeals to me more than 3d/FPS, but also the detail in the gfx: pixel-detail.