> release i7 notebook CPUs with more then two cores
U-series i7s have two cores. HQ-series i7s have four cores. Both are mobile CPUs. Remember though that more cores generally means more power consumption which generally means less wallclock time on battery power.
Intel's U-8XXX CPUs are rumored to offer 4 cores with a variable TDP from 18-45W this autumn.
It's my tinfoil hat theory why MS waits for an earnest update on their highend Surfacebook. A high-end quad-core Surfacebook with a 10-series GPU and 32GB LPDDR with real Thunderbolt 3 Ports would make for a 13" dreammachine...