I really don't want a smart blender or a smart fridge.
But a 'smart' thermostat? Might save energy (and money). A 'smart' sprinkler or lighting control system? Might save water or energy (and money). A 'smart' door lock? Might save time and effort getting keys copied or locks changed or letting in guests while away. A 'smart' frying pan? Might cook a salmon fillet to perfection every time and let me master new recipes the first time.
Does the reality of today's smart devices match the potential? Unclear.
But if 'smart' means something that will give me, the user, a superior value -- defined very conventionally and rationally, such as saving time, saving money, making something higher quality, or making something easier -- and if the superior value outweighs the added complexity and cost, then maybe I'll take a look.
(Disclaimer: I make a "smart" frying pan but am not particularly in love with the word "smart." It simply helps people cook easier/better/cheaper/faster. https://www.pantelligent.com/ - comments of all kinds are welcome.)