Maybe can take it one step further by adding a scanner in the OVF to scan exactly where your eye is looking at and autofocus onto it. :bsmilie:
Its been done before, the Canon EOS 5 IIRC,is a camera with eye control, but people like me wearing specs a bit troublesome so no thanks,I'd go with the traditional choosing AF points of even more traditional, MANUAL FOCUS :bsmilie: