Imho, Last year was a terrible example. I literally almost fell asleep watching the Sony conference. Everything about it was just terrible, slow execution, every game was either multiplat, I already knew about, or it didn't interest me. And it was 2 hours when It could have easily been an hour and a half. Oh, and they spent about 30 minutes talking about tv which was the biggest criticism from the xbox one announcement. But Sony won because the only thing people wanted was a 400 dollar price tag and no drm, which they got.
This year will hopefully be different, it seems that the only big announcements that each company will be talking about will be about the games. And that's they way it should be. So I for one am hoping that we get to see a lot of amazing games from each company and the winner isn't decided because of some fluke, but because they showed the best games.