Using just dynamic GI is of course not the best idea, it is, lets say a combination of both. But having the possibility to use full dynmaic lighting “even partly” in a outdoor game, makes everything much more realistic.
A impressive game scene isn’t just a picture like a vray render, you have moving parts, flying rockets, sequences where the sun moves etc… A good game like The Divison or Battlefield 4, isn’t just about static meshes, things are moving are animated etc…
Enlighten is a good example of “combineing” both technologys…
http://www.youtube.com/watch?v=JZO1LF305UE#t=47
http://www.geomerics.com/enlighten/
Games like Battlefield 4 or the Division would never look like they look if not using full dynamic lighting with other technologys.
So no matter what “fans” of lightmass or precomputed lighting says, full dynamic lighting in combination with other technologies is the future.
And please don’t get me wrong, a precomputed light in a static scene, with like not really much movement or not a lot of animations etc… is of course the better solution when it comes to the quality.