The currently roll-out is only limited to Norway, Sweden, Denmark, Iceland and Finland countries, however company will release the update in other markets too in the coming weeks.
The Xperia smartphones users will need PC companion software to upgrade their smartphones to the latest software as there is no OTA roll-out.
You can find the full change-log of what can you expect in the brand new ICS based software at Sony developer website.

2 replies on “Sony starts rolling out Android 4.0 update for Xperia Ray, Arc S, neo V”
awesome and nice post . sony is late update for ICS . but samsung ICS update in past years . sony xperia rang device so costly
sony is the only company to provide ics to all xperia 2011 phones.