The question is not a matter of whether or not ICS could be ported to the WFS. It's possible, and it will undoubtedly happen in time. Don't expect HTC to build an ICS ROM for a year old budget phone, though.
The CyanogenMod team may port CM9 to the WFS now that it's easily rootable. I do know that the XDA team is working on an ICS/CM9 port for WFS right now and may beat the Cyanogenmod team to it. Give it a few months and ask again.