15-16 lifetime. Not having the initial price issues will make this sell more overall than PS3, IMO. Also, PS3 experience being so dependent on online elements in this current gen will drive sales of PS4. I am a firm believer that people get addicted to the smartphone, tablet, facebook, twitter, instagram, online gaming etc...online experiences they get used to being a part of. Once they get hooked on that the cost of a new device becomes more negligible to check out new interfaces and therefore games. A good analogy I can think of: Back in 2000 ish I can remember using more than 1 "dumb" phone for 3-5 years at a time with the "if it isn't broke don't fix it" logic. But since the world of smartphones came about, I look forward to upgrading a device as soon as contracts allow due to being able to enhance my user experience...AND those don't really have to do with potential of awesome new gaming either...