Recently the latest version of the Raiden testnet for Ethereum was launched, in which there are a lot of the same innovations (off-chain transactions, state channels and atomic swaps for tokens and smart contracts) for scaling as in Aeternity.
The developers intend to deploy Raiden in the Ethereum mainnet until the end of the summer (in August).
I think that Aeternity can face strong competition with Ethereum if delays start of the mainnet.