You had me chuckle:) There are however serious uses for very cheap sensors with brains, for example in food boxes to check that none of the packages was exposed

You had me chuckle:) There are however serious uses for very cheap sensors with brains, for example in food boxes to check that none of the packages was exposed to critical temperature unintentionally, or even prevent frauds in those places where they relabel expired food as fresh: a small chip that senses everything including air pressure besides carrying the manufacturing date and duration information,could also signal that the contents are non edible as soon as it detects that the vacuum bag has been tampered with.