It will not happen instantaneously, but over the next 5 years with things that are easier to do. You won’t have your complete ERP system consolidated in web services, but piece by piece where projects will replace pieces of the ERP system. But one thing is sure, rather than being driven by handful of steam driven mainframes at the center, the computing utility of the near future will be powered by thousands of remote servers. As the interfaces get standardised you have multiple choices to choose from, which implies higher quality software for less money and computing with fresh fluency