The article says it well - this sort of thing may encourage people to get involved in open source github alternatives just as this slop on windows has moved some people to linux.
I dont believe we will get a huge movement but every little bit grows the open source community which benefits everyone. It doesnt need to be the majority it just needs to be a growing minority to thrive and grow. Ironically Microsoft has always been very good at encouraging people to get involved in open source ventures just by behaving badly.