It sure seems so, based on the venerable analyst firm's most recent report:

[W]orldwide revenues for the augmented reality and virtual reality (AR/VR) market will grow from $5.2 billion in 2016 to more than $162 billion in 2020... Sales of AR/VR hardware will generate more than 50% of worldwide revenues throughout the forecast period.

This $162 billion figure has been widely reported everywhere, but as with the Bloomberg/Business Intelligence forecast on premium VR devices, no one I know has run the back-of-envelope calculations on this figure. But since IDC's report says over half this $162B revenue is from VR/AR hardware devices, that's $81 billion. And if we divide that by $350 per individual device sale at retail -- averaging the price of premium devices like Vive and low-end smartphone add-ons -- we get well over 225 million devices. (And that's estimating downward.)

I've asked the report's lead author, Christopher Chute, if my assumption is correct, because 225 million devices sold in such a short time is a massive market: