Speculations are that Microsoft will probably be delaying the release of the all new Surface Pro and other Surface flagship devices until 2017.
The primary reason behind the delay is that Microsoft want its Surface flagship devices to feature next-gen Kaby Lake processor from Intel thereby making them top-tier devices. But since Intel cannot mass produce that amount of processor required for all Surface flagship within such short time frame. Although Microsoft could have used Sky Lake chipset which is pretty powerful, they decided to wait out.
This is probably a good decision since the Surface flagship is an incredibly powerful product. Rumour has it that the Surface Pro 5, besides have a Kaby Lake processor will also feature a more-than-ample RAM capacity. The device will also have major upgrades from Ultra 4K HD display and 3.1 USB support. In terms of design and build, the next-generation Surface Pro will feature massive improvements and tweaks including sleeker body profile and slimmer design.
The upcoming update of Redstone 2 for Windows 10 operating system will have two parts. The introduction will come out around the end of this year and the complete update will be released sometime early next year. So when the new Surface products (including Surface Book 2 and Surface Pro 5) is launched next year, it’ll also get to featurethe full updated version of Redstone 2.