A new use for graphene is being explored: It's use as an extremely sensitive photon detector:

http://phys.org/news/2015-08-ultimate-detector.html

Sadly, the confluence of this new technology and film scanning will likely never happen, because film is not pushing a market for new tech anymore.

But if the sensors become available to the hobbyist, we might see someone 'upgrade' their drum scanner with one, or if they become ubiquitous perhaps a linear array of them replacing CCDs in flatbed scanners.