Realistically, Microsoft's Hololens is a form of augmented reality, not necessarily holographic technology.
The possibilities with HoloLens is probably endless. It not only provides implications is playing games, but also in helping create them.
Ideas
1.) Laser Tag meets HoloLens
One of the key points mentioned in the video above is that you can still see the real-world and all of the objects in it using Hololens. This could transform something like Laser Tag on a whole new level. Players could be fully immersed inside a videogame, running around and shooting at enemies projected by Hololens in a real-world arena. Then I came across the following video below.
