I see no reason to get all excited by this. It is of very limited use. It could give some additional info perhaps if a person had never had a DXA and had to have a CT scan of their lower spine and hips for other reasons. In that situation sure, makes sense to analyze the CT scan for bone density and quality. But there is no mention of a translation of this CT report to be able to relate it to a DXA. No way to use this going forward to track progress or worsening of your bone density. No one would keep getting CT scans to check bone density. Way way too much radiation. Perhaps if one had to track some other condition that was so dire you are ignoring the radiation. Maybe in that case you could continue to track your bone density?
In short this might be a useful one time thing for the subset of people who have lumbar and pelvic CT scans. Other than that I don't see it as important.