Slowly but steadily, a healthy content ecosystem is forming for virtual reality headsets.

A slew of smaller game developers have launched or unveiled plans for interesting VR titles, as have a handful of larger publishers such as Ubisoft. YouTube and Oculus parent Facebook (FB) - Get Report have worked hard to support VR-friendly 360-degree videos, and big-name studios have been creating a growing amount of content specifically for VR headsets.

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When it comes to video, content growth is being fueled by the launch of quality multi-camera rigs for shooting 360-degree videos.

While expensive by consumer standards, the rigs are well within the budgets of many professional content creators. GoPro's (GPRO) - Get Report 16-camera Odyssey goes for $15,000, and its upcoming six-camera Omni rig will go for $5,000. Facebook has unveiled Surround 360, an open-source design for a 17-camera array that supports resolutions up to 8K and is estimated to cost $30,000 to make.

Nokia (NOK) - Get Report, meanwhile just cut the price of its eight-camera Ozo array by $15,000 to $45,000, and announced it's bringing the device to China. Notably, Nokia suggests China, which arguably has the world's most advanced mobile services ecosystem, is "beyond exploding" as a VR market.

"Investments, new companies offering content creation; all aspects of the ecosystem are going crazy on VR," says an exec.

Nokia already has an Ozo-related partnership with China's LeEco, which is producing the Matt Damon movie The Great Wall, as well as with Disney (DIS) - Get Report .

Ultimately, a device like the Ozo probably won't move the needle a ton for a company of Nokia's size. And for that matter, the Odyssey and Omni will probably just account for a small portion of GoPro's sales. But VR headset makers such as Facebook and Sony (SN) - Get Report  have to be encouraged by the VR ecosystem's growth.