VR/AR funding increased more than 250% from '15-'17, reaching ~$3B in 2017

https://static1.squarespace.com/static/575e5cd62b8ddeb3fba63f79/t/5aa963d4e2c483ff9d60f3c9/1521050602030/VRVCA_Global+Investment+Report+2018_vF+%28EN%29.pdf