The report refers to a study which says that sitting is no worse than standing without moving the body.
However, the report does nothing to contradict past studies which show that sitting is bad for the body (in comparison with standing up and walking every n minutes).
A better way of reading the study would be to say that "sitting" and "standing without moving" are equally bad. A lot of other research suggests that sitting for hours is definitely worse than taking a break every hour (or n minutes) and walking for a couple of minutes in that break.