http://www.pcworld.com/article/31272...-14nm-cpu.html

In the end, Kaby Lake is a decent step forward. Is it as exciting as reading about a 10nm-based CPU? No. But it does deliver a margin of improvement that?s actually in line with the evolutionary steps that what we?ve seen from the last few generations of chips. Haswell to Broadwell gave us maybe 10 percent. Going from Broadwell to Skylake yielded similar results.

Does it mean dump your Skylake laptop and rush out to buy a Kaby Lake laptop? No, not at all. However, when you?re looking at a 20 to 25 percent difference between Kaby Lake and Broadwell, then you start to wonder. As you get to Haswell, where it probably opens up to 30 to 35 percent, or Ivy Bridge and even Sandy Bridge, then yes, an upgrade would be a game-changer.