This blog post was jointly authored by @Chirag_Mehta (Independent Blogger On Cloud Computing) and @rwang0 (Principal Analyst and CEO, Constellation Research, Inc.) Part 1 was featured on Forbes: 2011 Cloud Computing Predictions For CIO’s And Business Technology Leaders As Cloud Leaders Widen The Gap, Legacy Vendors Attempt A Fast Follow Cloud computing leaders have innovated with rapid development cycles, true elasticity, pay as you go pricing models, try before buy marketing, and growing developer ecosystems. Once dismissed as a minor blip and nuisance to the legacy incumbents, those vendors who scoffed cloud leaders now must quickly catch up across each of the four layers of cloud computing (i.e. consumption, creation, orchestration, and infrastructure) or face peril in both revenues and mindshare (see Figure 1). 2010 saw an about face from most vendors dipping their toe into the inevitable. As vendors lay on the full marketing push behind cloud in 2011, customers can expect t