The only problem is that at the moment is simply a prototype.
The invisible mouse is actually made of a system based on an infrared beam placed so that it creates a plan to the table on which is the computer.
Fingers are illuminated when they touch the table and the movements are taken by the cursor.
When the user reaches the table with its fingertips, the cursor clicks.
The development of the prototype cost $ 20, there is no reason why the major manufacturers do not go into mass production this type of technology.