im not sure about this, but personally i think etherium is not yet in this short time will be surpass and replaced by other coin, include tron.
How would ETH will replace TRON when ETH is already in the top spot?
What we are talking here is the lower rank coin like TRON to replace ETH, based on
https://coinmarketcap.com/, ETH is rank no.2 while TRON is rank no. 10, there's a big disparity between the two but it's still possible to replace ETH but less likely to happen.