Once ETH releases ring signatures dapp its over. The only chance for monero to survive is to increase adoption by a tenfold.
Monero doesn't even have a GUI (not saying that would increase adoption!). Man-child developers..
Look at the blockchain,
http://chainradar.com/xmr/blocks , blocks are empty of transactions.. No one is using this shitcoin..
Anyway, I'll keep exchanging xmr for ETH, most likely it won't even exist this time next year.
Unless it is enforced (and thus mandatory) on the protocol level it would simply be a mixer similiar to Bitcoin's Coinjoin (perhaps one with better privacy features). Therefore, it will only slightly improve fungibility. Also (afaik), the fees to mix have to be done with transparent coins, which leaks your privacy.