All of the major WW2 powers' military forces evolved over the war as technology advanced, with the lightly armed and armored tanks and underpowered and under-armed warplanes of 1939-41 replaced by far heavier and more capable systems by 1944-45

But France never got the chance to evolve beyond its 1940 interwar era military, and even after being liberated largely used American equipment

Do we have any information about how the French military and industry would have evolved their designs and force structure to meet the later WW2 battlefield had France not fallen? Were there any promising design concepts or prototypes for France's "next generation" highly capable tank or fighter plane that never saw reality due to the war?