https://medium.com/cobinhood/dev-update-7-bigger-things-ahead-9f67aee59
Apart of margin trading coming there are some other interesting features announced like other blockchain integrations that will allow trading with LTC, XMR or other big ones coins that it is not possible now.
Also the possibility of set market and stop orders, which is a great feature that I miss now in Cobinhood.
Other interesting feature, now it is possible to generate the key to operate with the API which allow to work with Cobinhood and it will increase the volume.
Apart of that several improvements in the UX and also for the App. You can operate with you cell phone and that's something not all exchanges have. And this is second month since they started. I like Cobinhood and I see a great progress, so I can't understand its current low volume, but I guess that these new features are going to help a lot.
If we consider that we may see now the benefits of holding COBs (like new ICOs/airdrops) there are some strong reasons IMO to consider Cobinhood is going to do a good 2018.