How come they don't make and sell Super Nintendo's anymore?

Same thing with Sega Genesis and the regular NES. People these days want to buy them for some reason and play old school games. Ive noticed retro gaming becoming pretty popular. They are just trying to use emulators on the Wii and stuff now. I think its stupid. The real thing would be much cooler. Who else agrees? Wouldn't it be cool to see Super Nintendo boxes brand new on the shelves again at target? lol