For Intel, the step from Single-Core CPUs to Dual-Core based chips was a major step forward in the mainstream area, which also coincided with the end of Netburst. For 2018, Intel plans another big step: The first Hexacore CPUs for laptops.
http://www.notebookcheck.net/Intel-Coffee-Lake-Hexacore-Notebook-CPUs-available-in-2018.185189.0.html