Unfortunately this year I couldn't visit Sitecore Symposium in Las Vegas, so I had to hear second-hand about all the new stuff that has been released and is going to be released.
Fortunately, my colleague Jonne Kats did visit Symposium and in this blog post (https://mercury-ecommerce.com/tech/sitecore-experience-commerce-9) he tells you everything about all the new stuff coming in Sitecore Experience Commerce 9.
Let's hope there will be a beta version soon so we can start testing it!