I don't gamble, but I made the first dice app on steem. It was running well over a year, there is no need for smart contracts for provably fair gambling. The max risk due to the app doing the transactions centralized is what you set in a bet, and 3-6s later you and everybody else know if you've been scammed.
I stopped it because too many people lost a lot of money, and I originally only coded it as a proof of concept. I don't regard gambling as something that needs more platforms, people can lose their money in enough places already. And even if you think it's beneficial, it's already possible on steem.
The idea of native smart contracts on steem has been discussed and discarded long ago. We already start to see the scalability problems decentralized calculations bring with them on both ETH and EOS, and a lot of people saw them coming from the start. As long as there's no good solution to them it's wasted effort.
//update: Even ignoring the last paragraph - where was anything announced that new features would be implemented into steem? So far all his talk has been about merging with TRON, including STEEM. His exchange announced to swap STEEM to a TRON token, and this announcement is still up!
If he comes up with plans to enhance STEEM everyone will happily discuss his ideas. But we certainly have bigger issues than smart contracts, which would have to be developed completely from the ground up anyway as steem and TRON are completely different protocols, with seperate codebases.