Yeah, a huge leap, like, from the equipment needed for the first photographic picture to photo-sensor-chips as large as your pinky-toe-nail taking hi-res pictures and movies through a hole one millimetre and less in diameter, in all possible ranges of the electro-magnetic spectrum. Fast enough to take a shot of the ending of a LASER beam.
Oh, and you can make a HUD on your own, just face your (active) mobile phone display towards a window (closed, with glass, just in case XD) and you should see the reflection of the display on the pane.
Et violina, H-U-D in yo' face mon. :P