In every business it's the same. When new technology comes up the existing businesses will evolve or die. And obviously new businesses will also rise strong.
Same happened with mp3 and music industry...
Yeah, if you will not adopt the growing technology then your business have no place in the future. Banks will stay because they will slowly adopt the system, and continue to think for some other options in order for them to survive. I know banks will grow more in the future because of this technology.