ethereum is still used by more people than tron. as long as that is so, i do not think that tron can pass ethereum so easily. ethereum grows up through icos and tron also needs something to grow up and avoid ethereum.
We are in the competition, XRP has dethroned last year for sometimes and the same thing that it possibly is happening again even there is a huge number of ETH users than of TRON. It will come into the situation that many investors have picking up TRON that time making a step over ETH but ETH does also to retain its place after. This is how the competition flows, support is what they needed.