Microsoft has announced it would start pushing updated versions of several long-criticized Windows 8 apps, including Mail, Calendar, and People, the "Modern"-style program for keeping track of contacts, to the Windows Store today. Mail, Calendar, and People run in the new "Modern" UI, formerly called "Metro," that's included in Windows 8 and the default UI of Windows RT, the limited-function edition designed for tablets and ARM processor-equipped notebooks and hybrids.