First off, let's be crystal clear: this is a work of pure imagination, not some sort of leaked image of the next HTC HD device. What's so impressive so me is the quality of the mock-ups...you'd never know that this was a mock-up of a phone that doesn't exist...until you look at the specs, because that's where things start to look a little too creative. The creator wants a 1.5 Ghz Qualcomm Snapdragon processor, but as far as I know, that speed of processor doesn't exist yet. The 1 GB of RAM seems like overkill, but the 16 GB of internal storage sounds about right. The 4.5 inch screen running at 800 x 1280 sounds cool, but that's not supported resolution of Windows phone 7. 4G? Nah, we won't see that yet. USB host? Nope, not compatible with Windows phone 7. 8 megapixel camera that can record 720p video? Maybe...just maybe. I've heard rumblings about phones this year being able to do HD capture.
So that's the mythical HD3. What would your dream Windows phone 7 device have on it in terms of hardware? Yeah, I know you want copy and paste, but what about the hardware?