Since 1999 when HTML 4.01 became a standard, the online network (the web) has transformed a lot. With the arrival of HTML5 and CSS3, battle for the new markup has also begun. Being a developer, rather than discussing which markup is best, one must be aware of new ideology so that one can modify coding habits for better web results. Even though both HTML5 and CSS3 are a work in progress, there is not any reason not using it right now.