A recent Engadget article proclaiming "A fully working ICS ROM for the HTC Desire HD" gained my interest and made me pull out my DHD from the drawer it had been languishing in since the arrival of my HOX.
The article pointed to the Blackout ICS V3.0 and said it was fully working despite HTCs recalcitrance to release the required drivers and libs. HTC had decided it wasn't going to upgrade the DHD to ICS because that would involve wiping all the user data to get sufficient operating memory. In effect a 'factory reset' and that would spoil the 'user experience' (man, I hate that phrase).
So, since my DHD was already rooted, with a custom recovery, from the days when I couldn't wait any longer for HTC to provide an update from FroYo to Gingerbread, I dove in and loaded Blackout V3.0. All the functions I use, including the camera (a major sticking point in DHD ICS ROMs), wifi and bluetooth work perfectly well. A major surprise was the GPS, which under GB was adequate but a bit of a dog, that got a navigation lock within a minute from cold and gains hotlock in about 15-20 seconds.
I was also reacquainted with the joys of being able to do a full nandroid backup. So when I also had a dabble with a Jellybean ROM, then decided it wasn't quite cooked enough, I was simply able to recover back to the Blackout ICS I had set up.
To top all of that off I just loaded 'Google Now' for ICS on it, and am suitably impressed!
So here I sit, with my newly reinvigorated Desire HD (tweaked, backed up and with G Now) in one hand and my stock One X in the other. The display, power, camera and looks of the HOX still win the day. But the DHD runs the same live wallpapers without a pause while scrolling, and doesn't have the annoying '3 dot menu bar' in any apps.
I wish HTC hadn't made the unlock, root etc so difficult for the HOX. Having to tether and go through the hassle of reflashing multiple things through fastboot every time I want to try a new ROM is a big turn off.
I have proven to myself there is still life in my two year old phone yet.