Nanotechnology Makes it Possible for Mice to See in Infrared

Clearly, mice brains are adaptable to new stimulations. I think you are underestimating the adaptability of your own human brain.

"made the infrared light appear as the color green,"

How then would we know if we were looking a leaf or a cold potato?

Vegetation (cellulose) is highly reflective of near-IR. So your lawn would look green whether it's dead or alive.

...and the point of this exercise is what, please?

Prelude to a human version, is what they're saying.

"Current infrared technology relies on detectors and cameras that are often limited by ambient daylight and need outside power sources. The researchers believe the bio-integrated nanoparticles are more desirable for potential infrared applications in civilian encryption, security, and military operations."

"So we believe this technology will also work in human eyes, not only for generating super vision but also for therapeutic solutions in human red color vision deficits."

Biggest problem that I foresee is where do you get human volunteers to test such a product. There may be people willing to have/use "super vision" but they won't want to be risking their eyes on a prototype.

"In rare cases, side effects from the injections such as cloudy corneas occurred but disappeared within less than a week. This may have been caused by the injection process alone because mice that only received injections of the buffer solution had a similar rate of these side effects."

Of course, there is nothing even in mouse terms, to evaluate any long term effects.

So they are a long way from having something that a free person in their right mind would give informed consent to have it tested on them.

To help rats find warm things in the dark?

IR vision attack rats for security applications?

Terrifying, but James Bond and Jason Bourne will be dressed in aerogel IR-masking suits...

https://insights.globalspec.com/article/11317/aerogel-material-masks-objects-from-heat-sensing-cameras

To help rats find warm things in the dark?

"But infrared radiation, which has a longer wavelength, is all around us. People, animals and objects emit infrared light as they give off heat, and objects can also reflect infrared light."

https://www.sciencedaily.com/releases/2019/02/190228141412.htm

I believe the Science Daily version is misleading. There's near infrared (λ ~ 1 μm) and thermal infrared (λ ~ 10 μm). An object has to be hot enough to almost glow red before there is much "near-infrared" emission. Warm bodies, T=300K, (people, animals) glow brightly at 10 μm wavelength but not at 1 μm, the wavelength where these nanoparticles operate.

"But infrared radiation, which has a longer wavelength, is all around us. People, animals and objects emit infrared light as they give off heat, and objects can also reflect infrared light."

Yes, managing thermal radiation of electronics, inside a satellite, in a vacuum, can get tricky.

This technology is undoubtedly aimed at night vision for soldiers...

To ultimately abandon the bulky headsets now used....

But using 1μm radiation (near IR) requires an illuminator, which is a spotlight to anyone with a NIR imager, not exactly stealthy. It won't replace true image intensifier night vision.