I talked to Joshua and he said Bongo 3 is not binary compatible with Bongo 2. It also seems that the Bongo 3 SDK won’t be able to handle Bongo 2 calls either. This means that they need to release, and after that we need to release a purposely build V-Ray against Bongo 3 SDK (breaking all existing Bongo 2 user setups), then you’ll be able to use it.
It is a pretty delicate situation. If I were you, I wouldn’t bet on it. Furthermore “near future” is quite a stretchy term