Google ATAP Project Soli for Virtual pen tablet?

I was wondering if Soli could be used to detect a pen movement instead of gesture recognition because that way any flat surface could become a MS Surface Studio or Wacon Cintiq in the virtual world.

THE ICARUS DREAM

The universal dream of fligh like a superhero could be achieved just by adding the property of water resistant sealing to the VR hmd´s and accompanying laptops bagpacks. 

Got the point?

Simulate zero gravity underwater!!!! Wouldn´t be crazy amazing!!!!

So engineers from the VR Nation, let´s lay down to our design desks, full throttle to our brains with the goal to add the sealing characteristics to the VR equipment. 

It is not a piece of cake nor it is like to defeat a dragon with seven heads, right?

Let´s finally fly like Icaru has dreamt of.