It is reported that the upcoming successor to Skylake/Broadwell will be Kaby Lake and not Cannonlake. The Kaby Lake architecture will be using 14nm process with USB 3.1 support, along with full fixed-function HEVC Main 10 and VP9 10-bit hardware decoding and HDCP 2.2. It is assumed that it can be used on existing LGA 1151 socketed motherboards for the currently available Skylake and Broadwell processors. As you would expect, all it would need is just an EFI update.
It was reported earlier that Intel may have 200 series chipsets launched, of which it was indicated to have 24 PCIe lanes instead of 20 along with Intel Optane Technology support. However, this is uncertain for now.
The 10nm Cannonlake was originally scheduled, but Intel had to push that architecture for 2017 launch. While Intel Broadwell was a good architecture, it didn’t bring anything significant to the users enough to make the jump. It was exciting at that point when Cannonlake was originally scheduled for an earlier release.
Not much is known about Kaby Lake architecture. But according to the latest leak, the i7-7700K will be a high-end mainstream SKU to succeed i7-6700K. What is known from the SiSoftware Sandra’s website is that this has a base/boost clock of 3.60 GHz/ 4.20 GHz. It also has an 8 MB L3 cache. As of now, the performance gain in comparison to Intel Skylake and Broadwell is not known. If the performance boost is not significant enough, it shouldn’t be a surprise if the majority of users will decide to wait for Cannonlake instead.