Creators will absolutely pay a premium for such tech when the alternative goes for thousands of dollars (a quick google shows these devices selling on the order of 2000 to 7000+ USD). The SDK alone would generate much more value for such a product.
VR definitely killed any interest in the "core" gaming market, but I think the uses of motion tracking is a completely separate audience from VR anyway. Without some dedicated apparel, a VR kit can only track your eyes and hands. motion tracking gives you so much more data to work with, for potentially multiple subjects as well. People working with that data will easily pay themselves back with whatever they develop with it, which is why maybe a licensing deal (similar to Unity/Unreal Engine) may be a better way to monetize .