Does anyone know if it works the same as the hololens in that it is purely additive light - it can only make the image brighter rather than being able to make b

Does anyone know if it works the same as the hololens in that it is purely additive light - it can only make the image brighter rather than being able to make black pixels. This severely limits the kind of thing hololens will ever be able to do - it certainly isn't going to be replacing any screens.