We are already deep in the current cycle of disruption by software. "IT" (if you include programming, security, data centers, support staff etc) is fairly large and more diverse than advertising and/or "newspaper".

I don't think it works like a waterfall / Gantt chart; it happens in parallel and we are currently seeing lots of white collar office jobs changing. (HR|Finance|Recruiting|Legal Council|Retail) are all getting optimized to the point that their ranks are thinning quickly. My first job was moving physical file-folders between a storeroom and an office -- that job is now obsolete as those files have largely been digitized.