One of the most unusual things is that the chips will have support for USB 3.1 (10 Gbps) and 802.11ac Wi-Fi.
Other than that the 300-series chipsets are a bit of a yawn and look too close to the 200-series offerings. They have connectivity for up to 24 lanes of PCIe 3.0, up to 10 USB 3.0 ports, and six 6Gbps SATA ports.
Benchlife claims that there will be a range of chipsets in the 300-series with Z, Q, H, and B-series models with progressively-reduced capabilities. So don’t expect wi-fi as the chips get cheaper.
Intel's next Core chips use 14-nm technology, but we already knew that.
The new slide is connected to the desktop chipsets ("-S" platform). Benchlife says the desktop Cannon Lake processors are scheduled for release in Q4 of this year.