Hi all! My name's Alex Duncan, and I've been working on experiments in model making on the HoloPlayer. Here's a gif of my first attempt, which is a paired down version of something like Maya or Blender, but here the 3D cursor is the user's finger! Not to be outdone by @irreverentQ, I made a house. Mine's better.
I'm going a new direction now with this idea of a 3D model maker in with 3D visualization and interaction, gifs of that to come soon!