I think the idea would be to position the cursor and execute the focus with a button push rather than track a moving object/person. Somehow I don't think I'll be using a stylus in a run and gun shoot. Maybe a modified guitar pick. I don't know but I think this discussion may have reached the limits of usefulness. Until we see how the touch and focus works we really can't judge whether it will be useful beyond predictable, blocked, shots. I hope so and particularly for run and gun...but the proof will be in the pud.