Nintendo, no competition. I love Sony but most of their branding with PS has always been about one-upping, not out-innovating. The exceptions are DVD, the long con on Blu-Ray (their best move long term that I can think of), and smaller things like that.
That said, the 360 is VERY underrated in this regard. There's a lot with wouldn't have if the 360 hadn't been rushed to launch with all of these innovative concepts like overall achievements and native wireless controllers (though they still can't add a damn battery pack).
You should check out my YouTube channel, The Golden Bolt! I review all types of video games, both classic and modern, and I also give short flyover reviews of the free games each month on PlayStation Plus to tell you if they're worth downloading. After all, the games may be free, but your time is valuable!