I dont think that BNB would overtake Eth because developers has many options to build their own dapps on different blockchains.
and this coin can only be use in there palform no real use cases in other thing unlike ETH .
You are wrong, there is many project moves to BNB chain, if you think no real uses, you need to make a research about projects was swapped to BNB chain. I give some example, Mithril from ERC20->BEP-2 standard, Fusion, DeepCloud and more.
I think he meant smart contracts which BNB hasn't that is why shifting to BNB is still limited.