Converting digital hi rez photos to silver based black & white photos would be the stuff. But sadly it is rare that digital photos are of that quality.
Too bad there aren't faster scanners. Maybe there are.
It probably won't make a difference in a thousand years any way. Maybe even 200 years or three or four or five generations.
Also, for all of those amateur photographers — group family photos and photos of people and family pets are what are interesting to future generations. The hundreds of shots of flowers and scenery get tossed the trash.