For me is the support of multiple chains, it's like a feature that is available not only on 1 chain like Ethereum network, it could be also available on other chains just like Solana or Avax network.
It is somehow bridge-related but to be honest, it's really complex, I am not sure if there is already some project that already have this.
I don't really think it is complex as you might think. Considering what Cosmos(ATOM) Inter-Blockchain Communication protocol, this can be easily achieved. This innovation enables the free exchange of assets and data across decentralized blockchains. I believe this protocol is the stepping stone to improve liquid staking if only we take advantage of this technology.