Sony Mobile Communications Android 4.0 Ice Cream Sandwich update

Sony has made a pretty impressive commitment on Ice Cream Sandwich updates. Sony's has committed to upgrade its entire 2011 Xperia and Walkman smartphone line-up  to Android 4.0 starting from end March 2012. The first smartphones to get the upgrade are  the:

Xperia arc S
Xperia ray
Xperia neo V

By May 2012 the following units will get an upgrade:

Xperia arc
Xperia PLAY
Xperia neo, 
Xperia mini and mini pro
Xperia pro
Xperia active 
Sony Ericsson Live with Walkman

From a hardware standpoint all these phone run on 1GHz Scorpion processors or faster and have Adreno 205 graphics. 

I remain a bit sceptical as to how the Android 4.0 update will go because of one aspect. All of these phones, even the top of the line Xperia arc S, only has 320 MB of user available storage. I am guessing that Sony has found a way to reduce the foot print of its custom Android install. Updating the phone to Android 4.0 but significantly, reducing the amount of internal storage could be a problem for many users.
If Sony actually pulls this off and maintains a reasonable amount of user available storage it will be a big boost to the newly established Sony Mobile Communications.