Wow, having to stare at disassembly too often, I really like this.
Makes it much faster to follow branches and can easily see what instructions correspond to source code lines, even though it's not very exact at higher optimization levels.
With recent versions of GNU objdump, you can use --source --visualize-jumps=color and perhaps also --reloc or --dynamic-reloc for a similar experience with the native toolchain. (Unfortunately, -S/--source absolutely sucks for executables compiled at -O2.)
Other tricks include --no-addresses --no-show-raw-insn, which make the disassembly decently diffable.
Makes it much faster to follow branches and can easily see what instructions correspond to source code lines, even though it's not very exact at higher optimization levels.
This should be integrated in all IDEs.