Problem is that it has questionable uses in anything but long ranges:
In short range, it needs no Rangefinder (he's in your face, dude), or compensator (he's in your face). And
the fogless is not really needed. It's just unneeded in short range.
In medium range, it needs no rangefinder (he shouldn't be that far away). The compensator
may be somewhat useful in the later ranges of engagement (he shouldn't be that far away), But the fogless is once again, not needed. It's also still more expensive compared to the alternatives. Questionable.
In long range, a rangefinder is useful, and the compensator is also somewhat useful. However, you need stealth when being a sniper, fogless is not needed, and it's more expensive compared to a scope. May be useful.
This means in anything other than long range weapons don't have many have uses. The rangefinder might already be included in this age of scopes (I mean, it's quite important and it's already in normal Rangefinders), and
the fogless is not really needed. The compensator is the only good thing I can think of, though it's not always guaranteed (since things move in unpredictable patterns), and standing/not moving targets are just plain better targets.
Also, Chance To Hit? Dude, the world is unpredictable. The calculator would be mildly inaccurate at best with it's chances.
You could make a pretty decent stealth version, low reflectivity black-out glass on the fronting the sight.
Or get ocular implants, have the sight picture played directly into your eye.
Good point. Still doesn't make the holograph more effective in my opinion.