But now it has been confirmed by Microsoft that the HTC Touch HD2 *WILL* not get the upgrade to Windows Phone 7. Even with its large capacitive screen and a 1Ghz Tegra processor, it just does not qualify.
Microsoft is setting strict hardware requirements such as 3 hardware buttons and most likely at least a 1Ghz processor.
I think this is reasonable seeing that Windows Phone 7 will be released at the end of the year, and by then the HTC Touch HD 2 would be superceeded by some other hot HTC phone.
Microsoft's Oded Ran, "We've received many questions about the upgradability of HTC HD2 and we currently do not have plans to update the HTC HD2 to Windows Phone 7 Series... For Windows Phone 7 Series we are enforcing a strict set of hardware requirements to ensure a consistently great experience for end-users and developers... we cannot confirm that Windows Mobile 6.5 phones that satisfy those requirements will be upgradeable”
news via Neowin and Programmerfish