I suspect they probably have thought of this. But to me, this is one of those ideas that looks good on paper. The obvious main problem here is usability. Freezers work in this configuration because everything you put in them roughly turns into bricks that stack on each other without damage. This fridge would need all kinds of little compartments and shelves to keep things like produce from going to the bottom and getting squashed.
In order to have a fridge with the same capacity as an upright fridge, I suspect you would need quite a bit of floor space. There are practical limits on how deep you can make a fridge without it being difficult to use. It's probably fine if you're a single person and don't have a lot of stuff. But what about for a family? Finally, many kitchens have a "spot" for a fridge, and anything that doesn't fit there, needs to go somewhere else. It's likely there likely isn't going to be enough floor space.