An APU with a Polaris11-level iGPU and CPU cores that don't suck in single-core performance.
At least for the DOTA Pros who need constant 144 FPS Vsynced.
The disclosures so far for Zen indicate the chip that would be available for this event is the 8-core non-APU, so it seems unlikely we'd get much info on the future 4-core APUs.
Zen should improve frame rates, which should be helpful if the numbers are given and the comparison systems are fair.
Having Vega in the comparison would make the comparisons unclear, though.