Looking at Open Blockchain's use cases and it appears a lot of these can be done or are on Ethereum, examples: multi-sig contract activation, execution, atomicity of contract execution, reusable contracts, etc.
What are the main use cases of Open Blockchain (OBC), that are not supported by a combination of the Ethereum public blockchain, and private blockchains? Or what might be more suitable to implement on OBC instead of Ethereum?
eth
also asks questiosn! :)