I don't know about Adobe's Gaming Plan, but Flash should stay as a vector animation software in my opinion. Away3D and all that stuff are just programming frameworks. Flash helps users to export there vector animation for stage3D, and that's it. At the end, it is still 2D.
If you want to have a 3D pipeline, I think that another software should be developped with AS3 in mind, like unity or things like that. But Flash isn't appropriate IMHO. Maybe Adobe is in the course. Maybe not....
thanks for your answser
about the adobe's gaming plan here's the website
According to your opinion, that flash will stay where it was, and not much part of the gaming plan
thanks for that,
but a pitty, I thought there's might be a chance to desgin animations render by stage3d in Flash Pro:D