A concrete mass of technology experts and stakeholders participating in the fourth Future of the Internet survey suppose that by 2020 most people will access software applications online and share and access information through the use of remote server networks, rather than depending primarily on tools and information housed on their individual, personal computers. They say that Cloud Computing will become more dominant than the desktop in the next decade. In other words, most users will perform most computing and communicating activities through connections to servers operated by outside firms. This does not mean, however, that most of these experts think the desktop computer will disappear soon. The majority sees a hybrid life in the next decade, as some computing functions move towards the Cloud and others remain based on personal computers. By 2020, most people won't do their work with software running on a general-purpose PC. Instead, they will work in Internet-based applications such as Google Docs, and in applications run from smart phones. Aspiring application developers will develop for smart phone vendors and companies that provide Internet based applications. The aim of this paper is to clarify terms, provide the comparisons between cloud and conventional Computing, and identify the top technical and non-technical obstacles and opportunities of Cloud Computing.

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