Microsoft creates Windows Phone simulator for Android and iOS.

No, this is not just a launcher. In fact, it's not a launcher at all but a real Windows Phone simulator that Microsoft created using HTML so iPhone and Android users can play with and get a taste of Windows Phone 7. They can do that by using a mobile browser and pointing to this address: aka.ms/wpdemo. I ran the simulator on my Nexus One and it runs smoothly. Even the simulator is fun to use.