The Media Center is still the new kit on the block, but it is rapidly growing in popularity. A Media Center is a digital storage device where you can store your music, movies, pod-casts and photos (or any combination of the above) for easy retrieval at any time.
Because they are computer based you have almost unlimited options when it comes to filing this information. For example you can arrange your music collection by genre (classical, party etc), by artist, release date etc. The flexibility applies to all of your digital files.
The other big advantage is that once on your system it is not difficult to direct these files to any area of your house.