According to the latest speculation, Intel may be planning to implement code signing and whitelisting into their future lines of processors. On first glance this sounds like a good idea to help alleviate the disaster that has been Windows security for so long, but there is one little detail that I am not sure Intel has considered: what about those of us that don't run Windows?
Then, of course, there is the whole ethical and "Big Brother" aspect to this: do we really need to be told at the hardware level what code can run? What about independent developers? Will there be a way for them to bypass the feature or "turn it off?" And, again, what about those of us who run Linux or another open-source OS? Does Intel really plan on implementing code signing for all of the different OS's out there? A lot remains to be seen about the details and implementation.