I certainly aplaud and fully support the new Adobe 3D technology and the answer is reasonably complete. Thank you.
I think too though that readers should be aware that other viewers are available that also provide all the information in a single light weight file using the JT format. The viewers are also easy to use and come in a price range of free to a bit pricey but it all depends on the need of the users. The so called "pricey" ones offer "high end" digital prototype capability for considerable analysis well beyond the simple "reading" and "visualization" of parts and assemblies.
The Adobe solution is nice because only the author buys the authoring tool and users/readers only need to use the "free" reader that we are all too familiar with when it comes to the pdf format. But again, there are light low cost and no cost viewers packaged with the UGS products that produce this 3D PMI, meta data attributes, and precise geometry translated into the JT format. Other systems are also tapping into the JT format technology to follow suite.
The message here is not one of competition among viewers. It is that the technology continues to develop and will continue to build an infrastructure that will provide many options for accessing the information on the 3D model. No different then having a choice of many CAD systems where as back in the day there were only 2 or 3 worth mentioning. The 3D annotation capability is 10 years old. It just takes more companies like Adobe and programs like the JT Open program to build this infrastructure and spoon feed the culture into developing and accepting new innovative lean and more accurate ways of defining design requirements as well as interpretation of the design requirements.
I might mention too, that it is all so interesting that SolidWorks is now advertising Y14.41 compliant 3D annotation capability. I am looking forward to trying that out. But, I have to also "assume" that the company will work on getting the information into their edrawings soon, if they haven't already dones so. Maybe even the JT format too! eh? Anyone listening? :-)
Bottom line - 3D annotation is here. It has been here for 10 years. And it is here to stay and grow.