it would be cool, it is an achievement, a way to tell you that you rocks, so you should know when you have obtained one and do not just have a 0.5 sec splash screen.
Also, i would like to see the numerics values in the achievement screen, instead of only a jauge. When you have to kill 500 demigods to earn one, you like to know if you are at 102/500 instead of just looking at the jauge to estimate that you have ~20%.