Yes, king of. LN would still be as it is, but a channel would be opened on top of a statechain. 
Second case, yes - it is just part of the process of rebalancing without needing to go on-chain. 

So in the first case, the statechain would act as a Layer 2, with Lightning as more of a Layer 3; And the second case, Lightning and the statechain are sort-of inter-operable Layer 2s?


joda

There are several possibilities. One is that you could use a statechain to send someone a pre-funded channel off-chain (so instantly usable). Another possibility is that different LSPs could use it to rebalance channels to manage liquidity better, without having to go on-chain.  

tptrevethan

bitcoin

Mercury layer AMA

Can you go over how we can use state chains to help people onboard to lightning in a smoother way? How can an LSP use it to make their services better etc. 

ELI5 