Ok. Here are the testing results; sort of works.
In query tables, Only the Font related options seem to work. Colors, borders, not so much. Not sure about alignment.
Reference tables appear to match this behavior.
ALSO, my applicability condition appears to fail. I want to use a style if a reference BO is set (A.B IS DEFINED). This doesn't work. Not surprising since item rules have this limitation, but you are told about it when you try to use it there.
Foreground/background color would be really nice to have.
Working against 4.95. Browser was Firefox.