hierarchy and bookmarks
Hierarchy: The one thing that immediately occurs to me that some
people will consider really important and others won't care about at
all is the ability to have groups within groups (where subgroups are
top-level objects). So you can zoom in on a group, which will give a
top-level workspace and zoom out ad infinitum.
I also imagine that TabCandy and bookmarks becoming much the same thing.
I posted about this in the Saved Groups thread. I agree that TabCandy groups and bookmark groups are the same thing and they should be integrated.
I would definitely like to see this happen.