This gets curiouser...
I looked into the TM infos, and apparently the TM has recently been reassigned from Apple themselves to a firm called Axiotron. From my experiences with TMs, Patents etc., this is pretty unusual.
Axiotron have been developing some kind of ModBook:
http://www.macnewsworld.com/story/Axiotron-Living-Comfortably-in-Apples-Neutral-Zone-67481.html
Here is a screenshot of the TM info from the uspto:
This could mean a few things:
1. Apple plans to buy Axiotron out.
2. Apple might develop some kind of partnership where they are an exclusive distributor or reseller for the Tablets.
3. Some other possiblity?