If you want to change the look of your Windows Phone 8 emulator
You can now do this using the WP8 Emulator Skin Switcher to make it look like a Nokia Lumia 920, HTC 8X or Samsung Ativ S. Which is perfect for when you need to run demos and the emulators during a presentation.
Here are some of the awesome devices available
Using the emulator skin switcher is easy. download the latest release, install it and launch the application. select the skin you want to use and restart the emulator. it should now use your selected emulator skin. You can select a different skin for each resolution.