I have been robotic engineer for quite some time now, and I can predict that, adding intelligence to hardware already existed is quite easy, like smart refriger

I have been robotic engineer for quite some time now, and I can predict that, adding intelligence to hardware already existed is quite easy, like smart refrigerator which close automatically after some time, or door which send you notification when kids are at home, but to build robot that can paint a complex building is next to impossible, not that it can't be done, but to do it in a economically rewarding way is not just possible, because of relatively high number of technology involved for relatively low return of investment.