Yes, the holograms are literally objects made of light so at low brightness they are transparent, but if you crank up they will appear solid but you still won't confuse it for a real object because they are so bright.
I haven't watched a whole movie on it yet, but it wouldn't be a problem, the device is reasonably comfortable so you can wear it for hours
I haven't watched a whole movie on it yet, but it wouldn't be a problem, the device is reasonably comfortable so you can wear it for hours