Trx is becoming popular day by day beacuse of it's dapps features and transaction speed and fees. Also so many new ico projects are also using tron platform instead of ERC-20 for the reason of instability in ERC-20 network fees. That's why I think TRX can be a good opponent of ETH in future.
If the ERC-20 Platform does not fix the problem of transaction fees that are often expensive, then clearly TRX will be its opponent in terms of daily use for transactions, but if in the future the transaction fees from the ERC-20 Platform can be stable again, then everyone will use the ERC-20 Platform again even though it does not leave TRX.