Other specialist home robotics at CES include:
Otus - a machine that continually turns a tablet or smartphone to face the user while they video chat, so - for example - if they are moving around while they cook a meal in the kitchen they don't disappear from view
Zeta - an inkjet printer that crawls along a piece of paper to draw text and images, allowing it to be easily stored away when not in use
Atomobot - a mobile air purification machine that hunts the home for airborne dust and odours to remove
A Singapore-based start-up has created Otus, a robot that turns a smartphone or tablet to face its user when a video chat app is being used
High-five
One final home robotics trend is machines designed to help kids learn how to code
The latest entrant to an increasingly busy sector is Canada's Spin Master, which owns the rights to construction toy Meccano, and has just announced the Meccanoid.
Kids can build and program a robot to move in certain ways, and record and playback voices.
"I think it's a no-brainer," says the firm's marketing executive Tara Tucker.
Spin Master's Meccanoid can be programmed to mirror the movements of its owner
"Once you have built a robot that can pick up your soda pop, hit you over the head or high-five you, it's much more engaging that coding at a computer screen, and it will create future visionaries."
Whether those visionaries go on to build the nanny/cleaner/security guard/companion/carer all-in-one droid that many envisage when you suggest a home robot is another matter.
"Maybe in the very long-term that could happen," reflects Droplet's Mr Fernholz.
"But if you look at something that's been around for over a hundred years like the vehicle -
there's still no one device that transforms from an airplane to a car.
"So, while I think an all-in-one homebot is theoretically possible, it would either be cost prohibitive or in the act of trying to make it do everything, it could end up doing everything poorly."