As valuable as you make it.

That question reminds me of how television and movies were used in the classroom in the nineties.  When I was in school, high school and college too, teachers would try to find a movie on the topic of a subject we were studying in class.  They would play the movie during class time, uninterrupted and encourage us to take notes (which we never did) to talk about at the end of the movie (which was usually three days later).  This was not the best use of time, or technology. It would have been more valuable if you start and stop the movie for thoughtful discussions, and not have a video babysit the students.

Even back then, educators saw potential in new media, but weren't educated on how to best use the technology.

Same goes for the current use of websites in our curriculum. Providing students a web address to go to without any purspose or directions becomes a newer version of media babysitting our students. Or worse,