Education Innovation: University Diaries and Khan Academy

I'm torn.  Margaret Soltan at University Diaries is an English professor who trashes the use of Powerpoint and generally the use of laptops in class.  She makes a good case.  Then I read this article at Wired.com, hattip Marginal Revolution, on the Khan Academy and that points the other way.  (Khan Academy is a set of videos, each focused on one point (as in a theorem in math).  What's a person to think?