Competition already started getting part of the ethereum community. Just a couple of weeks back, I saw crypto kitties developer created a new game called NBA topshot but this time, they didn't use ethereum they used some other blockchain.
In this particular case, though, they are building it on Flow, which is their own blockchain. So it is not really a sign of "independent" developers switching to a competing system.
Ah, my bad I didn't know FLOW was from dapper labs too but you gotta agree because of the scalability issue and high transaction cost many developers are considering either moving to a different chain or building their own.