The prospect of including hardware-based security components is interesting, but the point has been made that there is a good chance that an Intel/McAfee security solution that would stir up legal fights with the rest of the security industry and regulators.
Whatever hooks Intel puts into its platform would then need to be opened up, so Intel has payed billions of dollars for the priveledge of a future product that it will need to open up to the competitors of its new acquisition.
There is some risk involved, such as a low-level flaw or compromised backdoor into Intel's platform at the level of hardware implementation. That could be more embarassing than an FDIV problem.
The McAfee name and its infrastructure and ties to many institutions is valuable, though, even if the security interface needs to be made open.