There is an article in USA Today regarding competition between Microsoft and Apple in regards to portable music.
DRM will be used to lock an individual in a particular product system.
Two comments: First, this is only one way to use DRM. See here. Second, there may be opportunities for companies that can create a cross-platform solution.
It seems to me that this is the first time information security mechanisms have been used in a B2B environment in a competitive fashion. Anyone have any other examples?