This last 2 years I have re-done a Cosmology course and done a Quantum Mechanics course. My head is in shame I’ve not yet got around to a Thermodynamics course but I do understand the principals including Entropy.
I am not criticising Anker / Nebula, not criticising a “compact 4K laser theater” only a consumer who has high expectations.
There is an inherent set of conflicting physical issues with a product which makes a centrally generated light, with that image being sharp (diffraction, collimated) with high frequency with power consumption and cooling (efficiency, fan, noise).
Shared image observation settings have been around for over a century but they have all been done in either night or artificially darkened spaces (drive-in cinemas, cinemas).
The advantage of doing in the dark is the human iris is open and itself makes a blurred image on the retina so you perceive less that the source is blurred. If you make the source brighter so can be done in brighter places, then the human eye will more easily detect lack of sharpness.
If you do increase the brightness and resolution you have to (in this universe) increase power consumption. That will force to be less portable, larger, and more cooling.
At what point does increasing image quality force non-portability? If it ceases to be portable then at these level of costs there are alternatives (flat panel static).
It is physically impossible to make as sharp an image via a reflected image than from a direct image. The photons diffract on their way out of projector and on the reflection. “4K”?
So long as this is all accepted by the consumer, that you must suffer a worst image quality, then fine.