HTC Vive sold 15,000 in ten minutes, and 100,000 in three months: http://www.roadtovr.com/htc-vive-sales-figures-data-100000-s...
"Digi-Capital cut its rather optimistic forecast for spending on virtual and augmented reality in 2020 to $120 billion, down from an earlier forecast of $150 billion." - http://fortune.com/2016/07/05/virtual-reality-htc-sales/