The potential application is hinted at with the slide "OSS-Fuzz@Home". Akin to the SETI@Home* mass-distributed computing project, this has the potential to scale in a HUGE way. Anyone with a web browser could simply load the fuzzer and contribute cycles... No need for any big downloads, any installs, special software, configuration or anything! Just visit a page and you're golden.
I wonder if Google will actually build on this. It's a great idea.