They are going to release 6C/12T Ivy Bridge-E CPUs September 10.http://www.custompcreview.com/news/ivy-bridge-e-cpu-prices-launch-date-leaked/18454
You won't see 8 core native in non Server parts til HW-E.
HW-E is confirmed 8 core native.
One could hope this means skylake will drop with 6 core mainstream.
But i geuss it depends how much threaded traction the consoles will give.