The S1 one is the previously alluded to Weather Resistant model touted by Fuji in earlier press releases. Also as expected a motorized 50X zoom lens. The HS50 is still being shown on the Fuji website so hopefully this means they are going to be continuing it for at least one more production cycle. If so this may bode well for a upgrade/replacement for the HS series announcement later this year at Photokina or one of the other large electronics shows to come later this year.
As they say….stay tuned!