I don't know. I think that is really unclear. But it seems the idea is that Microsoft has such a broad patent portfolio that people are afraid that they may unknowingly violate it. Jim McGreggor thinks that we simply grant way too many patents these days and that that is part of the problem.
Will the patent agreement with Foxcomm allow them to build systems for anyone if they pay the requisite royalties to Microsoft? If so, it could be a competitive edge for Foxcomm because their customers would have reduced patent infringement liability.