From April 6th NY Times:
In the past, changing out a slot machine was a complicated operation and entailed opening it, replacing the computer chip inside, then changing the glass display that markets the game's theme. The alteration usually took a day and could cost thousands of dollars, from ordering parts to modifying the machine.
"Now, I just come to my office, and select the program," said Mr. Beltram, the 28-year-old executive director for slots at Treasure Island, which is owned by the MGM Mirage. "With the technology, it takes 20 seconds."
Full story at: