It is common need to define and store variables within a SmartForm. This can be useful when you need to get values from a SmartObject which the View is not bound to. For example, the View is bound to SmartObject1, but you also need to get some data from SmartObject2. The only way to do that now is to put Data Labels on the form that can hold values returned by the other SmartObject and hide them. This is rather clunky and cumbersome to manage. Having variables within the form, much like you do in workflows, would be very helpful.