Would be kinda neat to airships plying the skies again, even if they are used only for cargo. That said, I reckon there would be a fairly healthy market for passenger airships. Perhaps not huge, admittedly, but enough to be financially viable I would have thought.
Given the novelty of the method of travel, the relatively slow speed would be a feature on such a trip rather than a hindrance. After all, nobody takes a trip on an ocean cruise-liner for the speed of getting from A to B :-) For business and the like where speed is necessary you take a plane. For pleasure, why not be lofted through the air in comfort and style? I'd sure as hell pay good money for that.