here is a new article from cnet which quotes
"Should you hold off on purchasing a new PC or Mac?
That answer is a qualified no, as we don't expect a massive change in mainstream performance from Broadwell (the current generation of Intel chips) to Skylake. And again, it will likely be several months for the new parts to come to your preferred brands."
as seen here http://www.cnet.com/news/intel-skylake-chips-what-you-need-to-know-faq/