If you can't communicate, you can't win. Professionally, lawyers are more accustomed to communicating verbally than visually. Effective demonstrative evidence combines the verbal and the visual. Speech is the least effective manner of communicating ideas. Imagine the difference between someone telling you the story of the movie Alien versus seeing the movie.
Trials are no different.
If you go to trial expecting to tell your story to the jury, an attorney prepared with compelling demonstrative evidence will overwhelm and dominate you, whether or not he or she wins the case. The only way to avoid such a scene is to be prepared to show your case to the jury. Technology makes the difference. Effective communication involves planning your presentation. In order to adequately plan, you must understand your case and know what your options are in terms of what you desire to present to the judge or jury.