At Worlds, we are building dynamic models of the real world, or digital twins, if you like. We can track a set of objects using sensor fusion(video, IoT, etc) and place them in an accurate spatial 4D model accessible through an API or our own viewer. I use our experience developing the Worlds platform as a key input to what I write here, but the writings are largely my own thoughts on how to achieve a machine reality we all be proud to use.