In the school district I worked in (and went to school in) there were I think 3 of those 3M boards stored in the tech department. Why they purchased them I have no idea because they were almost never used. I think they were intended for central office meetings more than classrooms though. All of the classrooms have dry-erase marker boards. When they built a new middle school a couple years ago, all of the rooms were equipped with a TV hooked up to a computer so the teacher could show PowerPoint presentations and websites. I think my little brother said that they've used them to show student-made PP assignments too.

In college the white boards are in all the classrooms, and most have projectors hooked up to a computer too. In my architecture seminars now the lectures are prepared by loading the images onto a website set up for the class. Each image is on a different page and during the lecture, they just click through them. It much easier for them to scan an image from a book and show it digitally than to waste time and resources making a slide out of it. The dry erase board is only used to show equations and calculations in my structures class and when my arch history prof decides she needs to draw 8 little dots to demonstrate the octostyle qualities of the Parthenon.