Well, I have a Mitsubishi 57831 that is now 8 years old. I have replaced the lamp once. Shortly after I bought the unit, there was a warranty issue that caused the set to shut down and act as though it had overheated. The problem was with a thermistor, and the issue got a lot of posts here at AVSForum. My dealer came to the house, picked the set up and took it to his shop, repaired it and returned it to me at no cost to me. The original lamp lasted five and a half years and I bought a new one (Phillips) with a cage for eighty USD and replaced it myself. I surely made a note of the hour-meter when I changed it, but I can't find it now. I am currently displaying 6474 hours.
I know that is not many hours for eight years. No children and we don't turn the TV on when we wake up. We watch during and after the evening meal.
I am highly satisfied with the performance of this high-end Mitsubishi 57" DLP and have no plan to replace it.
I have been so happy with it that I have not even looked at new TVs other than seeing a few as I walked through stores. I did not know that Mitsubishi had gotten out of the consumer TV business and didn't know DLPs were no longer made. On the one hand, that shows that I'm completely out of touch. On the other hand, it shows that I've been so well served by what I bought in May of 2007 that I haven't needed to shop.
I have a cable box connected to HDMI-1 and a Sony Blu-Ray player connected to HDMI-2. I watch more NetFlix than anything else. I used to watch a lot of news, but it is so depressing these days that I stick to movies and TV series. When college football begins, I will be following my favorite team (Roll Tide, Roll) on the SEC Network.
I do not wish to cast aspersions on LED, Plasma, Flat or Curved screens. I just wish to say that I bought a high-end and high quality DLP and have been well served. Obviously I'll have to replace it with something else if I live long enough, but who knows what that might be.