In reference to the section of the announcement about Multiple 3D previews, what processes such as collapsible windows, nestable windows or window docking or other such UI organization will be present as screen clutter could become an issue. I realize that the most likely response will be "It is best not to have to many open at once" but it is still a consideration that could be an issue. Away round this (Could be added in future) is if the preview windows allowed other windows to be dragged inside other windows then selection of the desired preview could be made form either a menu or list-box.
I will have a better refined idea of what (If any thing) should be done when I have used the system that will be in-place and offer my idea/s based on practical experience.
Regards to you.
Cyber-Angel