In no particular order (and for flexible definitions of “coming” and “soon”—things always take longer than we expect and aren’t inevitable):
Plastics made from atmospheric carbon (if Casey Handmer et al are right about cratering solar panel prices)
I think? Varda is making fiber optic materials in space.
The science things we can learn from messing around with graphene (not sure it will make a useful product anytime soon)
(Maybe) Ceramic airplane engines
In no particular order (and for flexible definitions of “coming” and “soon”—things always take longer than we expect and aren’t inevitable):
Plastics made from atmospheric carbon (if Casey Handmer et al are right about cratering solar panel prices)
I think? Varda is making fiber optic materials in space.
The science things we can learn from messing around with graphene (not sure it will make a useful product anytime soon)
(Maybe) Ceramic airplane engines