Game shows seem to be a popular theme for slot machines in the USA; the Indian casinos in California even go out of their way to plug their WoF machines (the gimmick is, there is a wheel on top of the machine with numbers from 25 to 1000, and if a "Spin" symbol shows up on the third reel when you play maximum credits, you get to spin the wheel and win whatever number it stops at).
However, when I went to Vegas last week, I noticed that three game show slots - Match Game, Password, and Family Feud - that were all over the place two years ago were nowhere to be found. It's not as if they're getting rid of game show themed slots; in addition to WoF, there are plenty of TPIR slots (there are different varieties, including Plinko, Cliff Hangers, Dice Game, and Punch-A-Bunch, and they all feature Rod Roddy's voice) and Deal Or No Deal slots (most of which are Australian "pokies", which are slot machines where the fruit symbols are replaced with playing card ranks (usually Ace, King, Queen, Jack, 10, and 9), as well as Press Your Luck and The Joker's Wild slots now. It just seems strange that the other slots would disappear.
-- Don