It looks like it has and built in range finder and self adjusting recticle for the particular caliber you are using and performs this calculation when you tag the target. Assuming you can adjust it for the caliber you are using and possibly adjustable so you could fine tune it for your particular load and bullet weight etc. this thing would still have to be able to adjust for wind conditions and I don't hear anything about its ability to adjust for wind so it would only be useful in only the most calm wind conditions. Of course if you really want to get technical, it would also have to be able to adjust for the firing angle, (whether you are shooting down in a valley/down from a tall building or up a mountain/up on a tall building, all of which also effects a precise shot calculation.
Also, I don't like that it takes the shot for you, a change in color indicator when you line up the dots would be better or at least offered as an optional setting.