Much easier to make ROI mining litecoin and the newer Scrypt coins. There will be no more SHA-512 so those miners are doomed to become obsolete where litecoin on the other hand even when ASIC's do get released 6 months from now they will not nearly have the power advantage of GPU's.

GDDR6 GPU's are going to be released here in a few months. The only advantage those ASIC's will have is a 50% reduction in power costs but the GDDR6's will have nearly a 4-5 month head start and can be resold as gaming hardware.