Now, on the one hand I want to say it's about damn time. The N/W line got R160s years ago, and the R trains were kinda shabby. So Congratulations to you R train riders - I hope this improves your quality of life.
On the other hand (the silly selfish one), I am going to have to start paying MUCH more attention on my way home! It's always been so easy. With the old trains, you could see the letter on the front long before the train ever pulled into the station. And once my line got new trains, I just knew that if it was a new train it was my train. But now... I'm going to have to actually look! Alas, no more being a lazy ass.
So there you have it people. One more step toward completely homogenizing the New York City Subway System. In the coming days I'll have to try to capture some images of old R trains for posterity - doubtless it's not a complete switchout... yet.