You have heard about HTC HD2 running its original Windows Mobile 6.5. U have also seen HTC HD2 running on android. The original hardware of HTC HD2 released since a year and several months ago, is still on par and better than most of the newer hardware released so far in terms of Specification. When compared against benchmark ranking, HTC HD2 is still at the top few position despite of an old device.
Now. The developers at XDA developers are going to port in Windows Phone 7 OS where Microsoft are not intended to bring the new OS into the HTC HD2, is going to be not a miracle. Before this, do u ever seen fruit phone able to boot two OS? No. Do u see robot phone booting two OS? No. Now HTC_HD2 is going to be one of the phone that is going to be able to multi-boot many OS and the hardware is making all OS to run smoothly. Remember.. This is not a miracle. Thanks to the developers in XDA Developers.