Fun, pretty, and full of a plethora of tools, the main thing holding Tiltbrush back is its lack of applications other than for visual artistic display- this makes it feel like a useless skill to learn in the long run thanks to the inevitable development of artistic tools for VR which are more transferrable to graphical industries and other such projects.
You know, like. Blender. Just, normal blender.
You know, like. Blender. Just, normal blender.

