What are the resolution requirements for a windows 8 store app? Does the app have to be auto fullscreen or am I able to set a size such as 600px * 600px for the apps container?
By default your app should run on any resolution. Below are guidelines from MS:
http://msdn.microsoft.com/en-us/library/windows/apps/hh780612.aspx http://blogs.msdn.com/b/b8/archive/2012/03/21/scaling-to-different-screens.aspx