Lately, HTC has been focusing all of its efforts on Android. We’ve seen new Android powered phones form HTC nearly every single month this year and yet their windows Mobile lineup seems to be non-existent. We speculate that HTC is simply holding out for a few months, waiting until the launch of the new Windows Phone 7 platform before they unleash any more handsets with Microsoft’s OS. While we don’t have any indication of what HTC might have in store for us, Australia’s Telstra is apparently planning on launching a new Windows Phone 7 handset named the HTC Mozart in October. While we’re excited to hear the name, the image on Telstra’s roadmap is quite unimpressive. Apparently, the HTC Mozart will run WP7 with Android in the background, or someone did a really bad job of Photoshopping the WP7 image on top of the HTC Desire. The good news? The HTC Mozart will most likely be making its way to the U.S. market and could be landing on T-Mobile just in time for the holiday season. 
Source: xda-developers
That is a HTC desire photoshoped, you can still see the android desktop on the left hand side.