Lenovo is going beyond smartphones and tablets with Android, putting the operating system in a unique 28-inch 4K smart monitor and a new, 19.5-inch all-in-one PC. The ThinkVision 28 is the first 4K monitor to be offered with Android, while the N308 all-in-one PC, which starts at $450, provides an Android alternative to Windows PCs. Android brings a familiar mobile user experience to desktops, with the ability to run apps and games and share files between devices, Lenovo officials said.