So now *every* lens can effectively have a focus-distance limiting switch, not just those huge white or macro ones? As long as there's no downsides (like there is for sensor-stabilisation vs IS), me likey.
This is only the start of what you can do with a dslr and some more creative firmware. Sony is an electronics company and is used to innovate with features, while my impression is that Canon's dlsrs are still analog dlsrs but a digital sensor and just the necessary firmware added. They wouldn't even consider adding things that Magic Lantern does, let alone help any 3rd party development.