ETH will switch to PoS, I hope next year.
And, you said righ that BCH might build up its strong ecoystem, part of it used for crowfunding platform.
The platform, when implemented officially, will help Bitcoin Cash faster expand its ecosystem, its demand will increase considerbaly.
But, I don't think that BitCoin Cash will be the only competitors with ETH.
There are already so many platforms for crowdfunding on the market, and ETH has still proved its use-case.
competitor of BCH is now only ETC. But BCH very easy to scale - just increasing the block size and there is no risk of vulnerabilities at this
Anyway, it is a good technical strategy of Bitcoin Cash. I love it.