N.B. Most other blockchains including Bitcoin & Ethereum will have live state channel like solutions soon. See Lightning Network for Bitcoin and SpankChain / FunFair / Raiden for Ethereum based solutions. The primary difference between these solutions & Aeternity’s state channels are that Aeternity’s are first class solutions meaning they belong within the context of the actual protocol while others are second class solutions that must be built on top of the base layer.