Equihash N=192 k=7 could fit into 4GB GPU, and parallelism of GPU over CPU could get some advantage.
So I don’t think it will return the power to CPU owners, nothing revolutionary here from my point of view. Dynamic increase of Equihash parameters as a difficulty could be more interesting.
What about a miner - I guess you can get any basic GPU miner, from example Tromp’s, and patch it to a new parameters.
I saw a miner dev posted that there will be a miner in few days with a 2.5% fee with 8-9sol/s for a 8GB GPU. It seems for the moment it doesn’t work for 4GB GPU.
We shall see about returning power , maybe there are some people with free electricity considering the diff.