If you don't see this happening, your business is not adapting quickly enough. First there was virtualization of infrastructure: Servers within servers. This did not eliminate admins because more "servers" were actually created. Many organizations created a sort of "virtual sprawl" turning 100 points of administration into 1,000 points of administration by creating tons of little VM's all over the place.

To combat that problem, automation tools have sprung up throughout the market. You can buy them from HP or BMC if you want "Enterprise Grade" versions. You can use some open source tools like Puppet. But the bottom line is that decent IT shops with decent tools will need fewer admins in the future because most of the mundane stuff will be done by "software robots" designed to handle it. You can't build a cloud just using virtualization - you need to automate the deployment of VM's, check config and security standards, ensure data integrity, etc., etc., etc. ... and most of that can be done by software, these days.

If you are a network professional or a Linux admin or storage guru, and you have NOT seen these automation tools - you need to. In a few years, knowing how to work THEM will make the difference in your career, not just the underlying infrastructure.