Where am I going to see performance gains when upgrading my CPU?

My computer is 6 years old now, and my CPU is still a Core2quad q9450 at 3.2ghz, but I’ve upgraded my GPU to a GTX 760. The biggest difference of course is going to be when baking light maps, but am I going to see better shader compile times or anything else? I’m planning on upgrading pretty much everything but my GPU when DDR4 RAM and compatible CPUs and motherboards are released.

Building lighting, importing objects, compiling anything and running gameplay code is all going to be faster with the CPU.