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.
An easy first step would be the long planned (year or so?) CounterpartyCash. Bitcoin version of Counterparty can't be converted on-chain between BTC and XCP, you need to go through exchanges which defeated the point. But with the new OP codes it can work and it can't be that difficult.
Airdropped 1:1 to BCH owners please, and BCH will be back to >500