I highly recommend watching the IDF 2015 Skylake disclosure video. The individual who gave the presentation goes into quite a lot of detail and I found it very helpful to understanding this architecture better.
The title of the presentation is "SPCS001 — Technology Insight: Intel’s Next Generation Microarchitecture Code Name Skylake."
I am pretty excited to see what they have to say about Skylake Xeon, but that's still about a year away. If Intel goes over Goldmont + Skylake Xeon at IDF 2016 then I think I will attend in person in order to pick the archirects' brains a little bit; also the Q&A sessions there are very interesting...sadly they do not include these with the webcasts.
I definitely think we'll see a Goldmont disclosure, but Intel seems to keep things mum until stuff is shipping in the market so maybe no Skylake Xeon until IDF 2017 Spring edition.
Intel has upgraded the front end of the Skylake core to allow a dispatch of six micro-ops at once, up from four on Haswell. This allows the queue to be quicker, but also the dispatch of micro-ops from the queue to the execution units has increased to six.
This will allow for fatter dual threads in a core which has for example improved throughput by over 20% in a spec subtest.
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