[abedavis]

A big part of it is that measuring the vibrations of large structures, like buildings or bridges, can be inconvenient and expensive. There are limited cases where you can measure new stuff with video simply because you don't have to touch the object or shine a laser at it, but the big win is that by making vibration measurement cheap and simple/convenient, it means you can do a lot more of it. We can start taking more measurements on more structures, which will tell us where we should put resources to rebuild infrastructure.

It might also make quality assurance/ product testing cheaper but that's less save-the-world :-p