As MMO players we have a fond familiarity with the traditional keyboard and mouse interface. We use the mouse to click on something then use the keyboard to perform an action to it. Sure, we might look at getting a fancy mouse to perform more actions or a snazzy keyboard to automate some sequences, but the principle remains the same.
The question is: do we still need them? Would it be possible to streamline the interface and bin the old keyboard-mouse combination or are MMOs just too complex to simplify? Is voice chat viable or do we still need text based chat these days? Would we get any benefits for making this change?