Looking at amd gpus on progpow i must say that amd gpus will be done for, nowadays you mine ethash 30mhs and use only 135 watts, eth progpow at 135 watts will never give as much return as ethash gives, plus nvidia will dominate eth progpow, It will be a blow in the heart of whoever owns amd gpus and use to mine eth. Progpow is a stepback back concerning amd gpus, a step right concerning asics and nvidia gpus.

If you have amd gpus will only be good at the beginning cause asics will be dead but soon after that you will not mine eth anymore, you will have to mine something else cause nvidia gpus will dominate it.