Technically all the Android powered devices capable of running of Android Gingerbread will be able to run Android 4.0 ICS but Practically all devices may not give an overall good user experience . So all the manufactures are reviewing ICS on their devices to check the user experience and will release the latest OS according to the results.
HTC’s list of devices that will surely get ICS :
* HTC Sensation (XL,XE,Original)
* HTC EVO 3D
* HTC Incredible S
* HTC Desire HD
* HTC Flyer
* HTC Rhyme
* HTC Desire S
* HTC Salsa
* HTC Desire Z
* Google Nexus One
Does this mean that all of these device will be receiving an update. Probably not. If I had to bet on which devices I felt that HTC would upgrade, I would say the Nexus One is top of the list. Followed by the Sensation variations, EVO 3D and Rhyme. The others listed may find their way to a delicious icy treat, but I would think that the newer devices would be first priority along with a completely new device or two before the updates even started.