To improve night vision performance you have 3 options.
Increase Lens Aperture
Increase Pixel Size (Lower Resolution Sensor - HD is optimium balance for performance and light gathering - x4 more sensitive than 4K)
Software Adjustment
In terms of digital night vision the top three performing products , in regard to night vision ability, still have the same defining factor.... huge apertures.
The market has pushed into 4K and 5K AND reduced aperture size... doesn't take a rocket scientist to predict the outcome.
Whoever bins 4K sensors and goes back to a HD sensors with F1.2 lenses and integrates IR , will dominate the market. the difference between HD and 4K during the day is very small, most would not notice, plus most 4K scopes only record in HD anyway.. ultra resolution is not the way forward in night vision products, daytime yes, night time no..
If I was producing my own scope, it would be two models, both tube design, one for airgun/rimfire and one for foxing and long range . 4K sensors would not be used. A HD sensor would be used, on the Foxing and long range I would fit a true 70mm focal length lens with a F1.4 lens to balance weight and performance, the HD sensor allows for this, as it's sensitive.This would beat a Drone Pro day and night and be better allround.
On the airgun setup again HD sensor and 40mm focal length with F1.4 or even upto F2.0 ! The HD sensor carries it so well , whilst a 4K sensor is crippled with small apertures at night...