A couple of years ago, a company called Axiotron announced an aftermarket modification for the MacBook that converted the Apple laptop into a tablet. The modification remains for sale at $699 and takes a stock MacBook, removes the keyboard and screen, and adds a Wacom pen-based screen to give the device a tablet form factor.
Transfer of ownership may not mean Apple has plans on using the term. Apple may have simply contested the trademark due to the potential for confusion between “TabletMac” and their own trademarks. But now Apple could potentially release a product called the TabletMac, and given the overwhelming number of reports of an Apple-branded tablet device, it certainly raises that question.