I still hear late adopters, leary of HTML5 voice concerns. You know these people, they won’t cast their stone until something is a “sure bet”. And how do they know it is a sure bet? When everyone else has done it, or is using it.
At that point, you are always playing catch up with your product, and your product at best is running in the middle of the pack.
So the news circulating that “Zuckerberg made a mistake with HTML5” only makes it more difficult for development teams as they approach management with development choices.
Here is a thoughtful response from Edward Schmit with the AT&T Developer Program
The Future of HTML5