I was using ActionBarSherlock to make my app run with app version of android and use actionbar, but now I don't need to support the old version and it is enough for me to support 4 and above , is there any benefit of ActionBarSherlock still for my case ?
Not really. Feel free to use the native API Level 11+ implementation of the action bar.
Note, though, that some things in Android may steer you in the direction of using an action bar backport... though the appcompat
one published by Google, not ActionBarSherlock. For example, the recommended version of MediaRouteActionButton
requires the appcompat
action bar, though I am maintaining a port that works with the regular action bar.