Disclaimer: I am not attempting to turn this into a WOZ versus ST battle as this is about something other than playing the pin.
That said, I do believe that the LCD's biggest contribution is to the other players/watchers. While the argument about what an LCD contributes to play is yet to be settled, the LCD seems to add to the experience of watching someone else play ... and this contribution will continue to grow as the use becomes more widespread and focused.
No doubt ST would be more fun to watch with an LCD.