The only unique ZCash feature - zero-sharing proof transactions of how it's called, consuming too much node resources to process. Hard to believe it will be used widely for that, for everything else there's monero, eth and btc.
We may fall into another 2-years low-profit mining hell.
If the bitcoin block size is not increased in the near future, so that it is not suritable for fast confirmation, people will use ZCash.