I'm especially stoked about space-to-space logistics. One of my first projects will be an in-orbit space platform factory, so that making a new space ship won't take a bazillion rocket launches just for the platforms.
And the addition of mixed-use rockets! That is going to make it a lot cheaper to easily kick up initial platforms.
It's already faster even without that because it now uses mixed content rockets to build ships and platforms. But space-to-space logistics do mean that you can make rocket launches less bursty and continually ship stuff into space to then use it.