Samsung has just distributed the worst news of this Ice Cream Sandwich upgrade cycle: the popular Galaxy S smartphone that sold 10 million units last year and the 7-inch Galaxy Tab tablet won't be upgraded to Android 4.0. The company's argument is that they lack sufficient RAM and ROM to run the new OS alongside TouchWiz and other "experience-enhancing" software. This will come as a massive blow to the great many users of the Galaxy S, who would have rightly expected the 1GHz Hummingbird processor and accompanying memory to be able to handle ICS — it's the same hardware as you'll find inside the Nexus S, and that phone is receiving Android 4.0 over the air right now.
The difference is the Nexus S runs pure Android, and the Galaxy S runs Samsung's own TouchWiz skin. Samsung (and other manufacturers who skin Android) always claim these skins enhance the experience. Those must be some wicked enhancements to forego the next generation of the OS.