This is interesting for screwing up badges at Defcon, but I wouldn't lose too much sleep over it. They're neat devices but not really used for anything critical. I'm also not sure they're being used for a lot of consumer devices. If you war drived a major hackerspace you might reset an led light art project.
They're a lot more ubiquitous than some burner's art projects. While I wouldn't necessarily fret over a light switch crashing, expressif chips are popping up in home security products like SimpliSafe. Likely safe in a home from the WPA2 Enterprise hijack, simply crashing SimpliSafe base stations might lead to fun times.
