My opinion is just that, bitcoin is becoming a coin that is beyond thee reach of common people and maybe only those in the high class can afford to own 1 bitcoin, hence the need to bring a look alike, well most forked coins might have not achieve the great success bitcoin is enjoying, but with continuous forking of bitcoin, one will break loose and could take over from bitcoin over time. I believe if any coin can find a means around miners. then we are in for another bitcoin lookalike