I agree, the anatomy data looks great 
I’d suggest exporting them in USD format, which will be easy since there already an exporter for Blender. USD is becoming very popular for this kind of data for content creation. We should look into making USD import/export tools for Slicer. It might be possible to put some of the functionality in VTK, but probably it’s cleanest to work at the application level.
USD is also the basis for Nvidia’s Omniverse. We may or may not want to use Omniverse but it indicates momentum behind USD and at least some level of maturity across platforms.