  The Web is becoming more and more a wide software framework on which each one
can compose and use contents, software applications and services. It can offer
adequate computational resources to manage the complexity implied by the use of
the five senses when involved in human machine interaction. The core of the
paper describes how SOA (Service Oriented Architecture) can support multimodal
interaction by pushing the I/O processing and reasoning to the cloud, improving
naturalness. The benefits of cloud computing for multimodal interaction have
been identified by emphasizing the flexibility and scalability of a SOA, and
its characteristics to provide a more holistic view of interaction according to
the variety of situations and users.
