http://hexus.net/tech/news/periphera...year-2021-idc/

Research outfit IDC is predicting very strong growth in VR and AR headset sales between now and 2021. The industry will benefit from a CAGR of 57.7 per cent reckons IDC, meaning that the sub-10 million headset sales seen in 2016 will climb to over 100 million units sold in the year 2021.