I've been participating in the Beta for SD 2018 - Summer release, and I can now share some of the materials I made with the new nodes.
The Shape nodes (Extrude, splatter, and splatter blend) are especially powerful, and let you wrangle data you scanned or created yourself in new ways. The shape splatter will be a familiar face/node for people who use the tile sampler, in that it can use vector masks etc as well.
Special thanks to Allegorithmic for the support and the opportunity to partake in the beta. It's been a blast!