WannaCrypt and Linux
Maybe. Maybe not.
For a significant number of home users? Maybe.
For business desktop users people dependent upon vertical software. No.
Software as a Service (SaaS)? Remember the witty proverb that “cloud” is a marketing term for “another person’s computer.”
More importantly, Linux based operating systems leave much to be desired with respect to usability and polish. People want to use their computer devices as tools, as a means to an end. They do not want to become geeks.