Hi -
The error you are seeing should be fixable at the os level - you can google around for GLIBCXX and libstdc++ and you should find the right instructions for your particular OS version.
On the plus side, I can report that I was able to run pip_install('open3d') and import open3d on both windows and mac and it appears that it will nicely interoperate with Slicer via numpy arrays.
Thanks for pointing out the library - looks super useful. Let us know if you get it working on your machine and how it works. I’ll definitely be looking into it too and maybe we can work up some demo code.