Generally, 3D is used to increase flashiness and destroy usefulness. From numerous forgetting web browsers to games, such as Half-Life 2 and Warcraft III, designers have labored hard to make programs slower, more sluggish and less user friendly by adding the glitz of the z-axis.
Apple has bucked that trend.
iTunes 7 incorporates a nifty tool that lets you “flip” through albums on your computer, and it will even download album art off of the iTunes store if you do not have it already on your computer. Apple calls this technology “Cover Flow,” and it is an easy, intuitive, and relaxing way of browsing the music you own and what you want to play next.