Well I don't think so. Ethereum has great backing (KPMG, Microsoft, several VCs ...) so they are here to stay. Steem on the other hand provides great simplicity. Anyway, cryptocurrencies are generally not competing but, as a whole, bringing more and more adoption to the masses.
RE: Is Steem the "non-technical Ethereum" rival of Bitcoin? Will Steemit be the spark that starts the rush of regular people into the cryptocurrency world?