The smart part of a fridge isn't inherent to the technology necessary (unlike DRM'ed TV streams and apps). In fact, bolting the display (or ice maker for that matter) into the door makes it conduct more heat and therefore perform worse. I don't know about other economic regions, but here the energy label is quite clearly visible on the front of every fridge, so they can't hide the power waste either.
I have yet to see a smart fridge cheaper than a similar normal fridge. Partially because manufacturers seem to market this crap like a luxury feature.
The cheapest smart fridge I can find on a reliable web store, at least here, is three times the price of a normal fridge (€1500 vs €500). Even in the huge "American style" fridges, there's a sizable price difference (€1500 vs €1000) before you get to the first smart fridge.