During the “Victory State”, that side’s influence can be seen and felt throughout the galaxy. Powerful bosses loyal the victor’s side will appear on Tattooine, Alderaan, Hoth, and Dromund Kaas or Coruscant. On each of those worlds, there are 8-10 possible places the bosses may appear, and a 25% chance in each spawn area that the boss will stay and face battle. If the losing side can defeat these bosses they will earn bonus Command Experience as well as a chance to earn Dark or Light Tokens. For example, if the light side wins, light side bosses will randomly appear on some worlds. If dark-aligned players defeat these enemies, they have a chance to earn Dark Tokens. These tokens can be used at the special cosmetic item vendor mentioned above.The losing side gets extra bosses to fight, as well as a boost in the next war. This is a pretty neat consolation for losing, as extra bosses/content is always fun. It's also very flavorful, as the new bosses represent the winning side oppressing the losing side or flaunting their power. I think this is a pretty decent attempt at making a mechanic which encourages the sides to switch winning and losing, and keep everyone from defecting to the winning side.
The only issue I see is that it would have been ever more flavorful as Republic versus Empire, rather than Light vs Dark. But I guess SWTOR has moved away from that faction division.