Ethereum is smart contracts...
Which I have explained in the Ethereum Paradox thread have no use cases that work technically.
For example, Slock and Augur won't work technically.
The details are all there for those who don't want to drink the Dapp Koolaid.
Have you write something about Bitshares?
Yes. Search the Ethereum Paradox thread for "BitUSD". Or maybe it was in the "POLL" thread for which coins are scams.
Btw, proof-of-stake will never scale out user adoption, because it is a vested interest paradigm, and thus will be destroyed by its stake holders. No stake holder (in any context or business model) allows a competitor to profit.
Only permissionless, decentralized systems scale.