With SuperUser, u can do alot of stuff.

1) Install this app called MarketEnabler to spoof your phone as one of the USA telco phones so that when u go to Android Market app, u can see apps reserved for USA market. Apps like Google Maps, Gmail, Youtube, Google +, Voice Search. This is how I get the latest Google Maps, Gmail, Youtube, Google+ version on my android

2)With SuperUser, it is the stepping stone to flashing custom Android ROM. I suggest u go to this forum for more info http://forum.xda-developers.com/forumdisplay.php?f=1270

3)With SuperUser, u can install Root Explorer, and go into your hidden /System/Apps and deleted unwanted bloated apps.

4)With SuperUser, u can install other hacked or modified apps like Talk with Video Call and the hacked Google Maps with Turn by Turn Voice Navigation for Countries outside of USA http://forum.xda-developers.com/showthread.php?t=1007132