The more i read about Rootstock smart-contracts, the more i realize that ETH days are numbered. Those guys at Rootstock labs will making a next generation improved version of smart-contracts that be realesed around the end of this year and will smash ETH into the ground.
Remember this; everything that will be build on top of Bitcoins Blockchain will crush all competitors.
Burning hundreds of coal fired state subsidized MW's for next to useless calculations might be ok for parts of the financial sector, but for many others this might be seen as a PR problem.