I decided to bring this up again because I'd like to know what people think about EPUB3 nowadays. I still haven't seen any reading device that would support EPUB3 except iBooks which supports partially.
New version of ADE is under development and they are sharing ADE 1.8 beta (
http://labs.adobe.com/technologies/digitaleditions1-8/) for public. At least, the beta version doesn't support HTML5 audio or video tags but I didn't test how EPUB made with 3.0 specs would work on it. I hope the final version of new ADE would support EPUB3 because then it would be a first step from a big company to support EPUB3.
Some Walrus Books company released video (
http://vimeo.com/25185473) of EPUB3 ebook that works on iPad. I'm not so impressed because stuff like this has been working on iPad for long time already. Also, creating books like that without proper tools is not cost-effective. Would be nice to know how many hours they have spent on creating that one book.
The Proposed Specification of EPUB3 (
http://idpf.org/epub/30/spec/epub30-overview.html) has been out for few months but when reading device manufactures and other companies will adapt and support it?
When do you think the first e-ink reading device which supports EPUB3 (at least partially) will be released and by who? What about EPUB tools, e.g. InDesign, Sigil and others will be able to produce HTML5? For InDesign, I think it will take some time, probably not even in CS6 version yet but I think Sigil can be adjusted for HTML5 quite quickly when it's necessary.
Other thoughts about adaption of EPUB3 and its tools?