I've been following this thread with great interest but, until now, didn't have anything to add to the discussion. I've had experience designing GUIs for big aerospace corporations' software programs and found that guys that are good with "hard" code are frequently not good with "soft" requirements such as graphics or promotion/advertising. Its a right brain/left brain thing - their minds just don't work that way. Stary's comments about the lack luster screen above are a case in point. The screen's appearance probably won't tempt a buyer who is unfamiliar with the virtues of TW products. It ain't fair, but that's how life works.
Generally speaking, TK's stuff has always been graphically challenged - roughly 5-10 years behind what might be called the state of the art. Yes, the guys commenting on this thread see past that, but you are talking about attracting NEW sim enthusiasts who don't know what TW guys know. What does such a person see when they almost accidentally stumble across TW? They see graphics that, in some ways, don't even measure up to the IL-2 releases of the mid-oughts. Note that I am not a big fan of IL-2 but, to be clinically accurate, IL-2 has frequently set the visual standard for flight sims.
An energetic and well thought out promotion effort could partially compensate for this deficiency: "Look under the hood, and see the essential goodness of the TW system."