The current official HTML standard is HTML4, which became the torchbearer in 1997. The much anticipated HTML5 was released as a ‘working draft’ in 2008 and, as of May 2012, is still listed ‘under development’ by W3C. However, browser developers have been working since 2008 to build tools to interpret this latest set of standards that are purported to be user-friendlier, more efficient, more easily translated across various platforms, and better capable of displaying multimedia.
It typically takes years for a new set of standards to be written, a few more years to be made official, with browsers to support them. In the meantime, new standards continue to be written, and new browsers
continue to be developed. It’s a never-ending cycle that keeps us web developers constantly on our toes.