re: Jerricho Cotchery's catch ruled incomplete after review - explanation?

Replay is creating a slippery slope on things where we are seeing imperfections in plays that probably would normally have been called catches (as well as fumbles where a guy has possession, but if the ball is even spinning a smidgen in super slo-mo, people scream "fumble"). I don't know if things are really that much clearer than before. I used to agree with barry that you knew a catch if you saw it, but not anymore.