Once we have contact lens or eye implant AR devices, what will you do, stab every visitor in the eye just to check? What about neurointerfaces?
That's why it's important to bring these issues up now - before they become integrated into humans. Maybe an indicator (maybe visual, or maybe an RF beacon) to indicate recording?
By the time until someone could run queries like you propose there probably might be at least former.
Free cloud storage and internet access better grow up by that time too, as 6 hours of medium-high quality at 720p take ~3.5Gb.
Cloud storage is already growing up, Amazon Glacier will store 3.5GB of video for 3.5 cents/month
To reiterate, a) nobody will care for your shitty home,
That's what people used to think about their online accounts "No one's going to care about my online shopping account". Yet new data breaches seem to be a daily occurance.
b) if a plumber's or close enough friend to have full access to his records are gonna rob you, they won't need to record shit. They'll just need to know you've got a nice 60" plasma and you live alone.
In the end, it's just the question of ethics. Bad guy'll rob you without Google Glass, good guy won't record and will take it off if you ask him to. What's exactly big qualitative change?
The plumber's friend robbing me has always been a risk. Having a data breach that releases a data about everything valuable in my home (as well as opening new social engineering attacks where the attacker knows in intimate detail the layout and contents of your home) is the new risk that ubiquitous video recording can lead to.