From this perspective television is about environments not interactions. Marshall McLuhan, the greatest culture, technology, and communications theorist of the Twentieth Century, points out that new media rarely eliminate older media. Rather they reposition them for new purposes. Here's an obvious example. Since the advent of television, radio is rarely a carrier of drama.
Television does that.
Radio changed because of television, but it didn't disappear. Nor will television with the arrival of PCs with tv programming. Whatever PCTV becomes, it must move into original content in order to succeed. Most certainly it will start out with a horseless carriage phase, mimicking the content of the old medium. New media do that.