The eyes of a chameleon move independently. He can focus on two opposite objects simultaneously with bidirectional vision.
Humans can’t, at least not yet!
Unlike chameleons, your eyes are moving together like one, that is what allows us to focus on a precise point. You cannot watch and focus on two different things at the same time, and your brain can only concentrate on one single point at a time.
Multitasking is physically not possible, even if you think so.
Ask the mother who keeps two toddlers running in different directions. She has to alternate her supervision, which is not so “super” after all… Something has to give up: Concentration on both kids at the same time.