I found this thread in another forum and it is Galaxy S3 launcher that can be used on our Arc/Arc S.
I use it now with on-screen-buttons (look picture above) and it is great and VERY smooth.
Only for ICS.
You can choose two different versions:
(a) Here is link to the forum http://forum.xda-developers.com/show....php?t=1667854 for 480 x 800 pix (if you want less wasted space in the margins).
(b) Here is link to the forum: http://forum.xda-developers.com/show....php?t=1670723 for 480 x 854 pix (standard fit).
Enjoy! You can also press "Thanks" if you like for my findings.