Don't be too excited. They are as toxic as asbestos.

https://www.scientificamerican.com/article/carbon-nanotube-d...

And, more recently, airborne nanotubes are leading to cancers: https://www.nature.com/articles/s41565-019-0472-4

Soon they'll be as common as microplastics and vastly more deadly but hey, cool new gadgets!