For a while I was considering something similar, where instead a couple of windows at a home would be miniature greenhouses/aquariums with openings arranged so that if the interior access was latched it would be impossible to gain access from the outside, but it would be possible to fill up consumables and drop off additional items (think tilapia for a scheduled dinner, but the usual protein product would be shrimp).

That said, I think making room for something like:

https://ogardengroup.com/

is perhaps a bit more marketable (though they missed out by not sizing it to fit next to a refrigerator).