I sort of expected this, but I hoped it would be more extreme. So say a 30% frequency drop with 50% perf/clock gain, which would again end up about 1.
Why? Because if we assume 5GHz is the hard limit in clocks, and 4.5GHz is for sane chips, then a greater perf/clock with a frequency drop would mean scaling for the future. I'm greatly simplifying this, but this seems to be the unavoidable way to go.
Also in laptops, addition of the FiVR not only in the CPU, but in the PCH will result in further battery life gains in realistic scenarios. Smaller form factors will either allow for greater battery capacities, or lighter thinner devices.
linking that
https://www.techspot.com/review/1847-intel-core-i7-9750h-vs-8750h/ whiskey lake endurance test
Intel got master job adjusting what they can get from 14nm, but they can't bend the thermals in long term workloads
I am expecting from Icelake to sustain higher clocks (my guess 3,6GHz all core), with better IPC it should result in
Whiskey lake- 3,1GHz 4C/8T clocks
Icelake - my 2C guess 3,6 GHz
with we say 18% IPC bump, 3,6x1,18/3,1= 1,37, so 37% performance bump
that is massive for a laptop
lets wait for official benches
I am looking for my i5-6300U replacement in surface pro 4, which has a fan and it is just 2C/4T CPU
this icelake looks promising