Iron Man is the current gold-standard for VFX-design and the breakdowns start appearing everywhere. Here’s a nice overview of the new HUD and the design-process behind it.
A little quote from the producers:
All of the 3D elements, including a miniature version of the suit and the holographic helmet, were generated and rendered from CINEMA 4D. These graphics had true 3D depth, which heightened the stereo viewing experience as well as the interactive light qualities that are both photo-real and immersive.