When Microsoft had announced its next generation Mobile OS Windows Phone 7, it had stated that handset manufacturers won’t be able to run their home-brewed UI on top of the OS like HTC Sense etcetera. Now, the folks over at Engadget have bumped across a video which shows the highly popular HTC Sense running on a WP7 handset. The video has a HTC Confidentialand For Internal Use Onlytrademarked on it.

After watching the leaked video, I am totally speechless. The 3D effects are just mind BLOWING! The 3D effects on the Notes UI definitely look stellar. The Weather and the Stocks application also have a very polished UI. It would be interesting to see if HTC actually pre-loads their WP7 phones with HTC Sense UI.

With the holiday season fast approaching, I expect LG, Samsung, Asus and HTC to announce a bunch of WP7 based phones soon!

Click here to watch the video.