I consider myself one of the Apple Fanboys and have no trouble saying it but I am very subjective when it comes to products.
I once myself decided to leave my dear iphone and went Galaxy S for a while and can say i enjoyed it a lot for about 6 months until i started to get really fed up with it and went back to iphone and have never looked back.
I can truly say that ICS definitely looks good and appealing specially if you still don't own a smartphone or are easily swayed by new shiny things that move and look pretty. I accept that things like FACE DETECTION is although unnecessary a cool feature that most will never use but it still looks and sounds cool. Same for the app drawers and popup stuff on your home screen that look pretty good.
Unfortunately after myself owning an Android Samsung phone i can say that whenever i see all this stuff...widgets...multiple screens...clocks...drawers...etc. all i see is BATTERY DRAIN....all i see is people running around with multiple batteries or buying those huge bulky batteries off Ebay that give you extra juice in order to allow all this running stuff in the background. This is one of the reasons i like Iphone...although many here complain of battery problems the lack of all this stuff just working all day at the same time makes a huge difference for battery life.
Iphone 4S suffers from battery drain(More than usual) right now, so what is your point?