The video points out that there are 2200 conference rooms, so while using white boards will save paper, but doesn't address the manpower needed to keep them up-

The video points out that there are 2200 conference rooms, so while using white boards will save paper, but doesn't address the manpower needed to keep them up-to-date, nor the expenditure on dry-erase markers (not to mention the PR this kind of project gets you in all the right places).