Full quote of what Mark Zuckerberg actually said about HTML5
The context wasn't really necessary.  I think we all believe HTML5 has a great future.  Hardware gets better at a rapid rate and HTML5 (CSS, Javascript, etc) is still improving.  The point is, and was, that it's probably best to produce native apps at this time, for the majority of apps.  Facebook, for example, needs a 5 star app.