Unfortunately laser modulation is pretty much the only solved problem.

At higher scanning rates the achievable angle of deflection with commercially available MEMS scanners (the type of scanner used in the 720p pico projectors) is too small to be useful.

The other class of laser scanner potentially relevant to practical high resolution projection are the solid state laser scanning systems, which suffer from limited angle of deflection AND a limited number of resolvable angles.

60fps 8k is achievable with a mechanical system using a turbine-driven polygonal mirror. Unfortunately, the precision machining, several tens of kilowatts input power and requisite hearing protection present some obstacles to commercialization.

As a general rule, if a raster laser projector claims to achieve much over 720p they are either lying, mistaken, or out of your price range. It requires an order of magnitude increase in scanning rate to scale from 720p to 8k. The next incremental milestone for this sector is "actually achieving 1080p instead of just lying about it".

I thought high resolution laser projectors were just using the laser as a light source and forming the image using a DLP or LCOS imaging element? Scanning 4k+ seems like it'd need some bonkers specs on the equipment.

And that vs 8k LED lit LCD projector with waveguides for depth. Same technology as used in VR goggles but with much more optics; and also smaller.

neat, how fast is the average time to complete a full 8k scan? I imagine it needs to be on the order of <1ms for it to look like a complete frame and not see rolling shutter-type effects.