We all know who Elon Musk is talking to. It's not us. It's the other billion people on youtube who will watch this and go, "this is the coolest thing I have ever seen".
This is definitely not geared toward techies. The closeup of the mouse and keyboard in the first few seconds is meant to make average people think "Oooh, this is high tech."
I think the close-up of the mouse is to illustrate his point about 2D interaction via mouse.