The idea looks good. The vision of open block chain network is something to strive for. I am not an expert in these things, but making inter-chain smart contracts work could prove to be a real nightmare for developers. The way smart contracts work now is already too complicated and bug free coding is difficult. Good luck with the project. What I would like to see is more github activity.
Yeah Interoperbility is going to be essential. No point have a bunch of isolated data in different chains. So much of the use cases for blockchain beyond money just wont work well without it. Imagine a blockchain is used for say kyc but if you move country or company that uses a different chain u are back to square one of making information useful.
