I've purchased games and apps from the market place on my WP7 (HTC Mozart). I've since bought a Surface Pro (Windows 8). When downloading the same apps in W8 I have to repurchase. The store shows no purchase history.
Are WP7 purchases not transferable to W8?
The purchase you made in Windows Phone Store are not the same as the Windows Store.
If you bought an app for Windows Phone 7 and it is available for Windows Phone 8 um don't need to purchase again but with Windows 8 this is not possible.
Some games can implement a mechanism where you don't need to buy in both stores but I only saw this once. It is not a common practice.
