I don't see how installing key loggers being easy is germane to whether or not enhancing Gatekeeper to delete unapproved programs is a future possibility.
I read the comment as being, "China's key logging exploits are evidence that it likes to control computing and it will seek to enhance this capability." The trend amongst world governments is to seek greater control of computing. I doubt this is going to stop with key logging software and won't be enhanced.
