I was studying an advanced degree at a school ~10 years ago and one of the teachers was "a bit" into graphene and they had done all kinds of cool stuff with it.

One example was a floor material for care homes that could detect pressure in a 2D sense, so the floor itself could detect "fall events" and track movement + gait etc.

And I think they had a prototype of a similar thing in Australia that weighed all trucks coming and going from a mine just under the road they drove, no need to stop on weighing stations.

No idea where that went.

Nowadays we'd do the fall detection with either a wrist device (any Apple Watch can do this) or cameras + "AI" detection. The floor is a lot more privacy preserving though, it only detected shapes and pressure.