It's not a problem actually, we can try to find some heavy hash alghorithm which require huge amount of memory (bye-bye asics) and which are very inconvinient for GPUs.
Inconvenient for something which usually has twice the bandwidth, twice the processing power, can be equipped twice as easily and can reduce latency to one hundredth.
Let me put this in a way everybody can understand: CPU massive processing is dead, it has been dead long time, either you acknowledge the fact or lie about it... and then get your ass kicked big way when the GPU advantage is unlocked.
The anti-GPU stance is a position only ignorants can defend.