Metro UI. For all we know will be an integral part of the Windows 8 Operating System. Part of Metro UI is a tile based design that you may have seen on one of the new Windows phones or on a screenshot of the new operating system. The tile based design is controversial, and it is not clear how it will be implemented in the new operating system. Windows 7 users who like the idea of adding tiles to their operating system for easier access to features, information and programs can now download and run a program called Pulmon which brings the design to the Windows 7 operating system.