Not to mention the security possibilities. I don’t mean throwing up containment fields; I mean making someone fleeing from pursuit slip and fall.
Ooh, that’s a good one - I was always bothered by security cells using power-reliant doors, but that’s actually a more practical use for a forcefield. Continuing the emergency-response idea, forcefields could also be used for emergency exits from burning buildings. You probably wouldn’t want them on-site, but if the fire department had a portable generator, you could instantly erect what would amount to giant slides, making every window an emergency exit. Not to mention the uses for quick, temporary structural shoring in burning buildings, and smoke containment. Hell, if all they did was make a smoke-free tube leading to the exit, they’d be useful.
I wouldn’t trust force-field projectors in a building for fire escape. If the fire’s so bad that you can’t get to elevators, the generators aren’t going to be reliable. It would be better to use the resources on containing the fire.
I HATE force-field doors for prison cells; they’re less reliable than steel bars, easier to defeat, and surely more expensive. A trifecta of stupidity.
Compact nuclear powerplants for things like watches and vacuum cleaners. Robot dog walkers, and robot litter box cleaners.
Well, that’s why I think it’d be better for them to be fire department equipment. Not so much as a replacement for fire escapes, but as a supplement for really nasty fires.
You’ll have no more botulism worries once you throw away those outdated mason jars and do your home canning with the handy household Bespin brand Carbonite Encaser!
Less mundane use - no need to get a babysitter for those toddlers on mom and dad’s date night!
Rereading your post, I see that’s exactly what you wrote. I must have been distracted by work. Stupid work.
Play Fallout 3 and shoot a beat up car for an example of why this idea might not be good. 
Large scale mecha (Gundams, Veritech Fighters, Hunter-Killers, AT-STs, etc.) - Industrial applications. ie: construction and such. Similarly, a few times on Babylon 5, we see the “Flying Forklift”, a civilian industrial version of the Starfury space fighter, painted in yellow and black stripes and equipped with manipulator arms instead of weaponry, along with some other differences.
In Niven’s World Out of Time, teleportation was so sophisticated that it could eliminate undesirable chemicals from inside the cells of your body. A more mundane use was a toilet with a self-cleaning backside-wiper.
In Larry Niven’s “known space” stories, the disintegrator ray worked by suppressing the electrical charge on either the proton or the electron. The target immediately shredded itself into a cloud of monatomic gas.
This would make a great garbage disposal.
In The Ringworld Engineers, the ship refuels itself with “a filter that passes only deuterium”. Which implies filters that can distinguish element from element, and isotope from isotope. Combine that with the disintegrator, and recycling becomes easy and cheap.
A rather dangerous one, no? Wouldn’t the reactions between the atoms of the “monatomic” gas be rather violent and potentially nasty chemically too?
The Ferengi already thought of this, as seen in the ST:TNG episode “Ménage à Troi”.
•I want to use incomprehensibly complex mechanical and materials engineering to create…a Dremel tool that makes a SQUARE cutting surface, instead of a spinning “disc,” while it’s in use.
Forget laser/hard light cutters; that’s cheating. 
•For Halloween, the ultimate decoration: a perfect (or almost perfect) bio-replicated copy of…my own skeleton.
According to the Book Of Strange Facts And Useless Information, this can be done by using an off center drill bit with a rhombus triangle cross section.
The Book has a mixed record of accuracy so it might work and it might not.
Powered armor/exoskeletons for sports. Basically, you could have team sports where everyone can jump fifty feet, throw things farther, and be ridiculously brutal without killing each other.
I recall a sci fi short where a giant humanoid war robot was discarded as hopeless impractical and ended up disarmed and used at monster truck rallies.
Transporters to beam urine out of your bladder, and fecal matter out of your colon. Come in handy when you made the mistake of buying a Super-Mega-Ultra Sized Slurm before watching Peter Jackson’s latest 4 hour epic: His all CGI remake of the East German film Irritant Number 5.
Post 7, and several posts since then :*D
The Pip-Boy 3000 from Fallout 3. Sure, it can keep track of your personal health levels, radiation doses, inventory, ammunition count, mission objectives, map, etc…
But I bet it would also be great as a blunt instrument to beat someone down with if it came down to it.
With sufficient money you could do that now with current medical imaging and cad/cam.
Yep, it works: Reuleaux triangle - Wikipedia
Holographic babysitter - Mom and Dad can go out for the evening and leave the kids with a hologram with the sophisticated intelligence of Voyager’s Doctor, so it can take initiative in case of an emergency.