I think this is absolutely fantastic news. Of course, we'll have to wait and see exactly what the details are in terms of work and dollar values, but it's great. With so much recent gloom and doom about SA's economy this could well give us a turnaround. Even though many/most of us won't have any direct link to benefits in terms of doing an actual submarine job, the flow-ons and general positive attitude ("it's the vibe...") to all of us should be highly beneficial, hopefully even contagious in terms of creating positive economic effects amongst local business.
I had been highly critical of the Liberals faffing about instead of making a decision to back South Australia/Australia, and I'm highly suspicious that if Abbott was still in, he'd have given it to Japan and we wouldn't have seen much work/benefit at all.
But having said that, credit where it's due, Turnbull got it right in the end. I genuinely look forward to hearing some stories of people who keep their job or get a job through the years because of this.