HTC confirmed via Facebook that the Desire S,Thunderbolt and other devices will be updated to ICS in August

HTC via Facebook took time to answer question regarding ICS update for some of its flagship devices.HTC in its comments confirmed that in August the Desire S and Thunderbold will receive Android 4.0 updates.

It's good to see HTC giving some pointers when users can expect updates but still, these former flagships are only making it to last year's version of Android nearly ten months after its release. 

One thing still remains is uncertain and that is how will be the nature of the update: An update will be available to all users or you will be an update intended only for developers and available through this site HTC.Dev? Unfortunately, HTC has not yet released the unequivocal pronouncements about it.

source (1),( 2) , (3 ), Via