Agreed, speech bubbles would be awesome. As a roleplayer, it helps easily see who's speaking on a level that is similar to real life. You see the person, you notice what they are communicating to you. We have such beautiful visuals to work with, why have yourself searching the busy little text box on the bottom of your screen? It creates a disconnect with the person's visual avatar and their text where a chat bubble near the PC helps make communication more intuitive.