Asus dual-boot Transformer Book Duet is dead. At CES this year, one of the big stories was dual-OS devices. Spurred on by encouragement from chipmaker Intel, Asus announced the Transformer Book Duet, a hybrid laptop and tablet that switches between Microsoft Windows and Googles Android on the fly. Unfortunately, the device has likely been cancelled due to strong opposition from Microsoft and Google, according to a report from The Wall Street Journal. [Google and Microsoft] each have their sensitivities to this, one source told us in early January.