或许这只是一个概念上的区别，说到应用只是标签及标准的不同。
XHTML将何去何从？XHTML的出现是为了解决HTML的可移植性及扩展性问题，是基于XML的一种HTML系列(an XML serialization of HTML)，包含了XHTML 1.0, XHTML 1.1, XHTML Basic 1.1, and XHTML Modularization系列，而新的HTML5将继承这一目标，变得更加标准、严格，具有良好的移植性及扩展性，而且增加了更多新的标签，如radio,video标签等。可以从这里了解更多关于HTML5。
HTML5以及CSS3始终感觉带有一点科幻色彩，更好的稳定性及可扩展性、支持XML的命名空间，更丰富可用的标签，更强的的布局机制类如多列显示，圆角、阴影、拖拽API等等等等，之所以说科幻色彩，是在想，有多少浏览器厂商会为促进这一进步而做出贡献呢？让我们拭目以待。
以下是W3C通知XHTML 2 Working Group Expected to Stop Work End of 2009, W3C to Increase Resources on HTML 5原文：
Today the Director announces that when the XHTML 2 Working Group charter expires as scheduled at the end of 2009, the charter will not be renewed. By doing so, and by increasing resources in the Working Group, W3C hopes to accelerate the progress of HTML 5 and clarify W3C's position regarding the future of HTML. A FAQ answers questions about the future of deliverables of the XHTML 2 Working Group, and the status of various discussions related to HTML. Learn more about the HTML Activity.
