I am thinking about this already for a year, but until now no solution yet.
What I would like is to be able to set a different template on a different level of taxonomy.
Taxonomy levels. With region as child of country and place as child of region.
When you fill in this taxonomy what I would like is that I have the possibility to have different panels-pages which I can select for different taxonomy levels.
SO when you are selecting a different level of taxonomy with for example panels_taxonomy, then a different panels-page (template) is fired to the screen.
Somewhat same functionality as the node/% or taxonomy/% functionality but with the possibility to change panels-page related to the specific vocabulary and the child level you are on.
This way panels can help to build a more level template website.
The usage of this will in my perspective boost the possibilities to use Drupal a lot!!