Microsoft just revealed that Dell is planning to announce a new Windows 7 Ultrabook tomorrow at CES 2012. Microsoft's chief marketing officer, Tami Reller revealed the announcement on stage during Microsoft's final CES keynote. "Dell is planning an announcement tomorrow about another amazing ultrabook so please watch for that and check it out," said Reller. Ultrabooks looks set to be one of the most popular buzzwords of CES 2012 this year, keep an eye on the latest ones in our Ultrabooks of CES 2012 stream.