Cloud doesn't have to be actually better, cheaper, faster, etc, to consolidate and reduce ops, system admin and network jobs. It just has to be highly popular.
So the jobs change. They move into "Developer" category where we will hire Developer with domain knowledge of "networks", "systems" or "operations".
I have seen it many times with big data, chatops (we wont ever need to login to the system! we will do everything via hipchat/slack/whatever), openstack (who even needs aws?!).
The work to manage infrastructure is smaller if most of it is centralized at Amazon or similar. Yes, there's still client side work, but there's an overall shift, consolidate, reduce, pattern.
