Aimpoint is now manufacturing Micro T1 and Micro H1 sights with a tiny 2 MOA dot. At 100 yards the dot will be 2″ in diameter, and at 1000 yards it will be 20 inches in diameter (about the height of the average male torso).
This product will appeal to hunters, but, in my opinion, the 4 MOA is more practical for tactical shooters.