I think ASIC's will gradually displace mining on graphics cards as the graphics card pushed out of the market mining on CPUs. Many coin makers do not want to change the mining algorithm of their cryptocurrency.
I don't think that's going to happen. Probably all existing coins are doomed. But the developers of the new coins will use algorithms that will protect them from asics. Almost all asics will only make money for the companies who produce them. They mine coins and increase the complexity of the network. After that, they sell asics to users but it is impossible to return the invested money. How long is this fraud going to continue?