http://www.techradar.com/news/intel-coffee-lake-release-date-news-and-rumors

Fifth time’s the charm. At least that seems to be Intel’s contention with its upcoming fifth round of chips to be based on the 14nm manufacturing node. 

After finally releasing the 7th generation, or Kaby Lake, Core processors unto the world late last year, the Santa Clara chipmaker tweeted that its 8th generation chips would harbor performance 15% better than their predecessors. Yet, on August 21, the company simply unveiled Kaby Lake Refresh, making Coffee Lake’s future dubious by effect.