It seems that this question has generated more than a bit of discussion, and I thought it would be prudent to continue it in a new thread named as such.
Now with GSN, I've seen Password Plus played with the wallets, and the little TV set things. I've seen Now You See It with that big board, and the chyroned grid in the desks. Still haven't seen Son of Blockbusters, but I don't think I have to, in order to come to my conclusion:
The game's the thing.
Yeah, it's neat to see the passwords flash on the big wall, or the letters fill the grid to the opening bars of "Chump Change," but as long as the game is good, I don't care how it's displayed. I agree that whatever element it is SHOULD be onstage, but as for one over the other, I have no preference. It's just not that big a deal.
Something else to consider: how easy is it to fix a computer or monitor problem? I would bet it's easier and faster than when a bulb pops on the game board, or if a word is loaded upside down. Nifty set pieces look nifty, but there's a bigger chance of something going wrong.