Don't we all remember. The time when the Nintendo 64 took over stores. It made families come together and game there little hearts out. However, many people these days (2011) would really like to play Nintendo 64 without the Nintendo 64, basically they want to play it on their PC's or MAC's.
There are also a variety of cool features that emulators have such as being compatible with many computer controllers and other controllers like a PS3 controller. This makes the gaming experience much more memorable, and exciting.
Finally, start downloading an emulator for your computer NOW! That is all. Peace :P.