Impact:
When doing fine alignment work, it is currently hard to nudge objects using the arrow keys because the movement is too coarse.

Reproduction:
 - Create some small shapes that you want to arrange in a very specific way
 - Zoom in and try to move them into your desired arrangement using the arrow keys
 - Note that the shapes move quite a large amount (on the screen) when zoomed right in, and not very much (on the screen) when you zoom right out.
 - Tear hair out that you can't get fine enough control over the beautiful arrangement of your shapes!

Desired behaviour:
The distance a shape jumps should be in proportion with the zoom level (i.e. it should jump roughly the same distance on the screen at all times, not the same distance in the document). If this behaviour is already present, its effect is certainly not strong enough!