When you're not using it, it works as a desk lamp.
Bring the black curtain down so that the hologram can be seen more clearly in front of you.
There are tiny projectors installed, giving off 3D hologram in front of the curtain.
A browser window can be resized by actually "pinching" and dragging the tab at bottom right.
It would be fun if a document could be made as if you were using a typewriter. The curled paper hologram comes out of the keyboard.
Touching the 3D objects would be really fun. Dragging, throwing, resizing, etc., but crushing paper to dispose it would be the most interesting.
You have to adjust the "depth" of the cursor on screen, so how about a mouse like this? By pressing the mouse body downwards, the cursor sinks (goes deeper) on screen. When you release it, it goes back to the default position (front).