I have been away from here for a long time! This is a good post to come back to...
I think what they're doing is going to have a great impact on the products and services available. As a software guy I'm often frustrated when using products which just didn't really take time to assess the process of the user and efficiently design the code to perform a given task. I may be egotistical in my own work, but I find that the nature of my own code development is that I learn a task constantly thinking about how to code the process, and then the outcome is a much simpler user experience and a good overall piece of code.
The shortcoming here is that as a worker I still have to take the time to do my job as I develop my code and I lack the focus, and specialization in software architecture to develop a truly great piece of code. By providing an app store integration and a developer driven architectural platform it encourages people in a similar situation to put in the extra effort to bring the idea to a place where it can be experienced my others.
This also provides a potent feedback loop to autodesk allowing them to tighten development cycles, because let's face it, they have shown a lack of experience in recent years and the user experience has been a little rough along the way. My guess is this is a business model shift towards being marketed like an OS rather than a platform and we'll see an app store with both autodesk and other apps much like google did with android and does for chrome.
Cheers ladies and gents, has been a long time...