With both Cort and Ibanez bringing out headless models (or ranges in the case of Ibanez), they've presumably seen that there is a good commercial opportunity. I think Mark was shifting a fair few Corts at Bass Direct from what he said. Steinberger has kept going with the Spirit range.
Headless instruments are better ecologically, as they use less wood - none wasted on an advertising billboard at the end of the neck.