Yeah from day by day the Ethereum competitors increase cause now there is a lot of coin who offer a smart contract feature too. Like NEO, ONT when we hodl them, they give us free gasses too.
But we must remember ETH platform is more famous than its competitors and you can see that a lot of ICO still using ETH as their platform. But i think ETH can handle it cause they are so active in develop their coin and i Hope they will give extra feature before their competitor walk one step above it. at the moment, ETH competitor still hard to reach ETH position.