Yup. Sony was so shameless in copying Nintendo, they even copied the whole "show the controller but not the system" concept Nintendo used at E3.
Nintendo did actually have the Wii U system shown at E3, they just never explicitly showed it on stage, and no one was sure if it was the final version or not. But they did have them at the demo booths in plain sight.
I know, I was just being silly. --- https://www.youtube.com/watch?v=KQ9Km7WW2aE Best console war summary ever. TL;DR version at 2:05.