Walt Mossberg: “This is my last column for The Wall Street Journal, after 22 years of reviewing consumer technology products here. So I thought I’d talk about the dozen personal-technology products I reviewed that were most influential over the past two decades.” The big item that seems to be missing from the list is Tivo. While we’re quickly moving to an on-demand world, I still think the DVR was one of the epic tech introductions of the past few decades. We could suddenly watch what we want when we wanted to watch it. And the rest is television (and cultural) history.