Basically, if you have Blood and Fists you're going to get some new martial arts styles based around science fiction themes (Singularity as a stealth/assassination style), and science fiction concepts (3 flavors of Beam Sword Fencing- Power, Speed and Mystical) along with some classes that tie into those concepts (the Beam Sword Kensei).
All these styles are done in the B&F style with mastery and bonus feat lists. Each style also has a few unique maneuvers.
I wont lie to you, there is also some stuff in this book you already have if you have B&F, including one of the classes (the Living Weapon is really close to the Martial Arts Master) and some of the common maneuvers (Bear Hug, Circle Kick, etc).
But there's still a lot here if you have B&F.
Likewise, if you have Blood and Space II books, there's some things for you here and some things you already have (mostly from the Prometheus Rising setting which is part of the B&S II line).
One of the styles also appears in Prometheus (Hopboxing) as does its signature maneuver (Hang Time). There are also some NPCs, two of which are Beam Sword Kensei and two are major NPCs from the Prometheus setting.
Hope this helps
Chuck