Cause I'm not an isheep, I need an actual reason to do things.
My phone is running pretty well on 5.0 and want to make sure there's not user reported probs w/5.1
Since I updated on 8th of March, I have not recharged my iPhone yet, and I still have 38% battery life left! Before the update, the best battery life on my iPhone 4 was 10 days max with normal use.
Photostream is the iCloud backup feature of your Camera Roll - those photos you have taken since the installation of 5.1 at this point. It was introduced with the 5.0.1 update, but you couldn't delete any of your photos permanently. If you deleted them, they would be put back by Photostream. Made Photostream useless.
With 5.1, the ability to permanently delete photos from Photostream was enabled.
Since I updated on 8th of March, I have not recharged my iPhone yet, and I still have 38% battery life left! Before the update, the best battery life on my iPhone 4 was 10 days max with normal use.