1. Open drawing toolbar in any application that has it
2. Draw a line
3. Enter Points mode (in Draw you can press F8)
4. Select a point by left-clicking
5. Press arrow keys on your keyboard
The whole shape moves. Having keyboard-driven move would be very useful as you can have finegrained moves by holding down the Alt key.
Individual points were not yet highlighted in old versions (tested 4.3.0).
You have to use Ctrl-Tab to activate the current point. Ctrl-Tab will start with the first point and then traverse to the end. The current point will blink by switching between small and large. Then you can move the point via arrow keys. It is an accessibility feature, which exists since ever.
But I accept this as enhancement request, because it is really cumbersome to traverse the points of a large object to get the point you want. A method with combines the selection of a point with activating it for movement by arrow key would be indeed useful.