The command would be similar to Look At, but would change the camera to be at the selected location rather than pointed towards it. The use case I thought of is seeing if any objects are in the field of view of a camera by using Look From on the lens. Then any objects on screen will be within the camera's field of view. To work in this way, Look From would need an option to adjust viewing angle, as well as an option to flip which side of the plane it is looking from. It would also be useful for assembly - if you have parts you want to position inside a box you can use Look From on one of the box's interior walls to get a clearer view of what's going on.
Please let me know if there's a way of doing this with current commands. Thanks.