Acer and Sony will be updating their existing tablets with the latest version of Google’s Android platform. The Acer Iconia Tab A100, Acer Iconia Tab A500 and Sony Tablet S will be receiving the Ice Cream Sandwich OS update. We’re expecting that some of the features supported in Android 4 will benefit these devices plenty. Sony also has room for additions to their dual-screen tablets. Would be interesting how those updates would pan out.

Those owning these tablets shall soon receive an alert message, letting them know about the new additions here.
Gottabemobile