It will get even more interesting sooner or later bitmain will announce a compute chip, which means whatever algo is minable on GPUs will be minable on this chip also, thats how the evolution will go , this will be the end of forking to change the algo it will be useless. This will drive the crypto market to make big shifts a lot of coins will be forced to make an implantation of POS solution or just keep the existing POW algo.
This is exactly USP of GPUs today and why they differ from ASICs. It will be probably challenging to make ASIC for some memory intensive algos like Neoscrypt. On the other hand Equihash was also supposed to be resistant, so we will see if they manage to crack the other ones too.