Years later forms are still the primary way our users can interact with us, more than just clicking on links or triggering JavaScript events. Indeed, it’s likely the first thing you do when you start up your favourite browser is type a search query into a form.

With a combination of server-side scripting and AJAX we now have feature-rich forms, but all at the expense of programming complexity. Funny thing is, we’re now so used to this sort of code that what is about to happen almost seems too simple.

Inevitably, as is the case with much of the HTML5 spec, HTML has now caught up with the needs of web designers and developers by providing a remarkably simple way of creating usable and even extensible forms.

Source: http://thinkvitamin.com/code/fun-with-html5-forms/