It is almost surprising that Microsoft did not come up with the idea of transforming her personal assistant Cortana into a hologram. After all, Microsoft holograms may be very much.
Well then. A fan took over this and his wife delivered the movements via motion tracking. The hologram understands the same questions and responds exactly as Cortana on Windows 10 but has in addition a feature more: It looks at one.
But see for yourself in the video.