Backwards compatibility is one important factor that is keeping me on last gen. Maybe I would have upgraded my PS3 if I could play my games on PS4. In addition, there aren't enough exclusive games that justify the purchase. I can play 3rd party games on PC, so, exclusive games are very important to me. That's why I chose to buy a WiiU, it has an amazing exclusive catalogue, and I don't mind the lack of 3rd party games.