The "soap opera effect" is adding additional frames on the fly that didn't exist in the first place.
In the 90's I saw an attraction at the Luxor in Las Vegas that used Doug Trumbull's Showscan process, which used an even higher frame rate.
http://en.wikipedia.org/wiki/Showscan
What I saw created the illusion live actors were sitting on a talk show set in front of me. Only minor telltale film nicks and scratches gave it away.