For those who want to protect their computers from thieves, the ability to remotely disable them sounds great. We're not sure the CPU is the component that should be targeted though. While a given stolen netbook, laptop, or desktop can no longer be turned on if Intel's new kill switch is flipped, there's nothing stopping the thief from taking out the HDD and putting it in another computer. As a result, you've only slightly slowed the criminal down and haven't really managed to ensure your sensitive data is protected.
Furthermore, those wearing tin foil hats will want to know if users have complete control over the feature. Is it enabled by default? If not, could someone else turn it on? Can anyone but the owner of the processor disable it remotely? Those might seem like paranoid questions, but nonetheless Intel needs to guarantee that the answer to all three is a resounding no.