Is the ZH461 really 4K?

No. It accepts 4K and HDR input but its native resolution is 1920x1080, so everything displays at 1080p. It is a bright Full HD projector, not a 4K one.

How long does the laser last?

Optoma rates the laser light source at up to 30,000 hours and the projector for 24/7 operation. That means years of daily use without a lamp change.

How big an image can it throw?

From 20 inches up to 320 inches diagonal, with a 1.4-2.24:1 throw ratio and 1.6x zoom. A 100-inch image needs roughly 10 to 16 feet of throw.

Does it have lens shift?

Yes, vertical lens shift only, plus keystone correction. There is no horizontal shift, so plan the mount position carefully.

The projector, a remote with batteries and an AC power cord. Cables and a mount are not included.

Can I use it for gaming?

It supports up to 120 Hz, which helps with fast motion, but it is a business and installation projector rather than a low-latency gaming model. Check input lag before buying for competitive play.