Forrester’s Rich Gans chatted with UI designers and developers at Cynergy Systems, EffectiveUI, Roundarch, and Yahoo! about the user experience pros and cons of HTML5 and building complex online functionality.
Forrester has published a complete report on the subject, as well as a brief blog post by Ronald Rogowski that concludes:
The net of this is that, for now, HTML5 is not a viable platform for delivering the next generation RIAs that will power the future of online customer experience. Forrester recommends using HTML5 as a way to enhance text-based content experiences while looking to more established technologies like Flash and Silverlight to build highly functional applications.