Having revolutionized device touch interface with the iPhone, iPod Touch and iPad, as well as by the inclusion of trackpads on their laptops that mimic the functionality, it stands to reason that Apple would eventually attempt to bring this fantastic feature to their other computers and even competing computers. The answer was the Magic Trackpad.
One of the nice improvements in touch interface has been the development of multi-touch and the Magic Trackpad brings this feature to your desktop.
Overall, a fantastic device from Apple and the user feedback has been very positive. Score another one for Apple's innovative design team!