With this identified, how should the top panel be treated? Visually, it needs a differentiation from the normal clickable state. �
On the other hand, we can also consider changing the panel's behavior instead of the visual treatment, like how it's done on GNOME Shell while on Overview
http://img6.imagebanana.com/img/8yunbmeb/Workspace2_008.png�. Let's keep in mind that Lens and Overview may not be apples to apples in this case, though. Does it really make sense to make the panel inactive while a Lens is active? It may, but this will also depend on future plans for Unity.