Magic Trackpad™
It is not entirely clear what technology the trademark “Magic Trackpad” is meant to apply to and whether it would be some aspect of existing trackpads using in Apple’s notebook computers or if it would be some other device offering trackpad functionality.
A trademark is not related to any technology, patent, or anything else. A trademark is a reservation on it’s own, in one or more class of product or service, enabling the registrant to use it at will.
Trademark like iMac, iPod, Apple, Core i7, anything could be associated with them by their owner, it’s no technology or patent-related in any way. Example might be Apple changing iMac internally from PowerPC to Intel Core Duo, iPod as an hard-drive music player with a screen and rotating wheel used for a thumb-drive without hard-drive screen or wheel, Core i7 describing as welll 4-core 8thread processor or 2-core 4thread mobile processor, and so on…
A Trademark should just be considered as is, just a word, logo or sentence usually used to give confidence to customers or even trying to fake reality 
PS: In fact, I think that this is related to the “Magic Mouse” trademark, that was not owned by Apple, needing to rename their “Magic Mouse” to “Apple Mouse” last year. They probably don’t want the owner of “Magic Mouse” trademark to be able to use “magic” with a trackpad. Vengeance?
