Yeah, building a metro app is exactly like building a website with a few differences. The first is that they give you a style sheet to use that maintains the metro look-and-feel. You don’t have to use it, but it makes it much easier. The second is that they have a navigation pattern they “strongly recommend” to transition between pages. You can still use traditional links, but you lose the history. And, the final difference is they give you a WinJS library that has access to the Windows API to handle devices, file access, etc.
