Re: What is 'Smart'?
They would be "smart" if they used a network of different sensors to rule out false alarms. For example comparing smoke read outs with IR and temperature sensors readouts (of course you'd need more sensors scattered around than a single one....). They could also set up a light path for the safest evacuation route, while calling for help.
That would be being "smart". A device just designed to gather more and more data about you pretending to be somewhat useful is not "smart" - is "cunning" or "wily"...