The ZK810TST is a new and very bright 4K projector that should satisfy even demanding home theater fans. The light source supposedly lasts up to 30,000 hours, and the manufacturer claims that continuous operation is no issue.https://www.notebookcheck.net/Optoma-ZK810TST-New-high-end-4K-laser-projector-offers-7-200-ANSI-lumens.1001045.0.html
1100:1 contrast will not satisfy the most demanding home theater enthusiasts. I don't think it's geared towards that it seems. Maybe more for installation type stuff with ambient light. I can see it doing well there.