If Proview owns the name, they own the name. They chose a name—after Apple started using i names, but before the iPod, it seems—that turned out to have value; and Apple chose a name with the potential for some expense! I still think they chose well.*
I remember that Apple had to call AirPort AirMac in some countries. So be it, but I think they’ll settle in the iPad case.
* Flashback to when the 8-year olds were snickering about Apple using the word “pad,” because they forgot that a million tech products were already called “pads”: mouse pads, keypads, trackpads, gamepads, DDR pads, numeric pads, wrist pads, chair pads, and the PADD tablets on Star Trek! And pad thai. Mmmmm... pad thai....
1998: iMac revitalized Apple
1999: iBook introduced by Apple