To summarize Cloud 1.0 functionality is server provisioning, Cloud 2.0 is server provisioning and management, Cloud 3.0 functionality is virtual server, networking, and client (VDI / Remote Desktop) provisioning and management. Fluid Computing will be the next generation of architecture after Cloud. Fluid Computing replaces all functional specific hardware with commodity hardware. Functionality is managed by virtual appliances (routers, switches, etc) and virtual servers and clients.
I think this will be the timeline for Cloud and Fluid Computing architectures to become standard IT practice
Cloud 1.0 2012
Cloud 2.0 2013
Cloud 3 2014
Fluid Computing 2015