The take away message is that it is possible to focus something even though a lens or magnetic field or electrical field can’t do it. Rather than trying to fight physics and move an unmovable object you modify the detector which is completely under your control.
Another advantage of this technique is that you can instantly move from one satellite to another without mechanically moving the device.
Superman can instantly look at the wall, the woman behind it and any other part he want to visualize in detail by adjusting his retinal array.
When he retires he can sign up at one of the cancer medical centers that charge $20,000 for a localized radiation treatment. He can charge half that and place the beam right where it needs to be – as long as he doesn’t get distracted by the patient’s other attributes. “Wow! Look at the size of his – oops! Nevermind.”