A lot of ARM SoCs, particularly in the mobile world, have always had features like this. Apple even explicitly advertises it as a security feature on their iDevices. I think the difference here is because x86/PC has traditionally been one of the more open platforms, so attempts at locking it down are more strongly opposed. The PC is one of the few remaining computing devices where you can still inspect, modify, and develop with relative freedom.
rdl|10 years ago
userbinator|10 years ago