Wasn't there that episode of DS9 where a future version of Bashir and...somebody else...was on the Defiant and said somethignabout how they couldn't believe how they got by with these old 2-dimensional displays...???
That was The Visitor
, and I think they were talking about 3-D control panels.
Aside from navigation, I really can't think of many instances where a 3D display would provide more functionality than a 2D display. Sure it looks cool to us, but I'd imagine people in the 24th century aren't impressed with stuff like that. That's why LCARS is so simple.