if the mining hardware data linked from the memorycoin main page is accurate then my GPU is outperforming my CPU by a minimum of 10x
. . . and my bicycle is ten times as fast as my car!
My point is that the models are important. I think, per dollar, you might see 2X or 3X gains for GPUs performance wise. Might come at an energy-efficiency cost too.
$100 per H/m is a bargain for CPU mining.
$20 per H/m is for GPU mining.
It is also 5X more efficient than CPU mining with the same capital cost.
GPU mining is 4 or more times more energy efficient than CPU mining.
Now the fact that you think the market will pull through:
Lower electricity costs pull down MMC/$.
The advance of technology will morph GPU efficiency and will become more efficient (Power Wise)
--This will be enough incentive to capitalize by buying GPU cards and mine at a cheaper electricity cost.
Selling your MMC at a discounted rate due to the lower rate of electricity required to generate it will eventually find a way to cut off CPU mining.
This is just my opinion for the matter.