Hmm, I just looked at it again, yes, there's no health bar, but I do believe that it's in the same position as the energy. Also, I've just looked closely at the HUD, so here's what I think:

Look were it says "88%". It's colour is white, completely white. Where it shows "Energy" the bar is also white. Both correspond with one another. 88% (Or 90% to be approximate) is two of those uncoloured rectangles.
I believe that below it is the health bar, since the picture shows the player has enabled "ARMR". It is said with Armour mode enabled, you will be invincible for a few seconds or so, so I'm guessing for that amount of few seconds the "Energy" bar will be shown, until it runs out.
Or that "88%" is your health, which is, to be precise, not a good idea, since it's very small to see.
But if the Armour mode is a default mode like Crysis 1, then it completely destroys what I've said above. But I still like it, but I need to play the game in order to understand the HUD.
But for all I know, they did show the HUD in preview pictures of Crysis 1, and those changed slightly. This may not be the final version.