Some big project are currently making the switch to DDS-based pub/sub. [1,2]

Now that everybody is making QoS guarantees in pub/sub and message queues, is there a real difference to the 10 year old tech deployed in boats, trains and tanks?

[1] http://www.omg.org/spec/DDS/1.2/

[2] http://design.ros2.org/articles/ros_on_dds.html