FUD Zilla claims most of Intel's Skylake processors will be launched in the final quarter of this year. The site says this will include a full range of chips from Celeron, Pentium, Core M, Core i3, Core i5 to Core i7. Some more parts are expected in early 2016 and after that the wait is on for Intel's next tick, the 10nm Cannonlake. This die shrink of Skylake is anticipated by late 2016 or 2017.
We are sure that all SKUs from Celeron to Core i7 will run Windows 8.1 / Windows 10 just fine, as it is hard to slow down a modern processor with everyday tasks such as browsing, facebooking and instant messaging / skyping.
There will still be some processors to launch in early 2016, as the transition from one to another architecture across the entire product range usually takes a few quarters. If Intel manages to keep its tick-tock schedule, there is a good chance we will see Intel 10nm processors, codenamed Cannonlake, in late 2016, roughly 18 months from now.