The ones that have been around for a couple decades and were smart enough to cash out will probably secretly be sitting on their pile of cash giggling. The ones who know how to handle short sales and are used by the banks to dump property will be very busy. And the ones who handle rental listings will also be working hard.
The rest will go back to retail/service industries from whence they came and when that slows, I guess there’ll always be demand for fast food, school crossing guards, and grocery stockers. The vast multitudes of housewife-realtors will go back to being housewives and the surfer-dude-realtors will go back to living outta a VW van and smoking the cheap stuff from south of the border instead of the fancy kind from up north.