I have a 2011Cadillac CTS that has the digital display that shows what gear your in. Mine works like a bump shift. You bump the shifter and the next gear lights up. Might only be on the performance models but if you go to a Cadillac forum I'm sure those boys have dissected all the electronic stuff like that. These are no longer an old mans car.
"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut