HTC puts it all in a brief statement.
"The Windows Phone 8X by HTC is our signature Windows Phone available at AT&T, T-Mobile and Verizon Wireless in the U.S. With our focus on the Windows Phone 8X by HTC, the Windows Phone 8S is not currently planned for distribution in the U.S. market."
While the 8S wasn't expected to set the world on fire, it was expected to be an entry level Windows Phone option for those not wanting to invest as much as they would with the HTC 8X. All may not be lost though. We may still see the 8S pop up as an unlocked option through retailers such as Expansys. Plus, "not currently planned" doesn't really slam the door closed on the 8S.