This single still is from the widescreen version of ?Matriculated?, one of the Animatrix animated shorts. It has been considerably scaled back from the original material.
It shows a woman in a powered suit, sitting on the shore line, watching far out to sea. The eternal clouds shrouded above her and crackling lightning identify this as the Matrix ?real world?. She?s bored, and so is the cybernetic monkey in the jar beside her. She?s a sentry, waiting for any intruders to arrive on the island.
Yup, cybernetic monkey. In a similar fashion to how we add cybernetic implants to sharks and beetles now, this primate has been blessed with a full brain jack, and wiring of its brain into additional output channels. The creature seems at peace with the idea however, maybe because it seems to have been done voluntarily.
In this scene, the woman and her pet are mentally linked to one another's thoughts, so that they can sit wordlessly, and still talk to one another. In the harsh environment of a destroyed world, she has her powered biosuit, and the small monkey has a jar. Both serving the same purpose.
As an additional benefit, the nocturnal monkey's eyes' output, processed by its brain, can be sent, at the monkey's own choosing, back to the command bunker, if there is something it is seeing that it thinks others should know about. This symbiosis of human and animal friend, linked through technology is not exactly implausible in our own future.
Link: Animatrix: Matriculated