I think in a very high cost of living country (Switzerland) this would be good economics if you trained your staff to put stuff in front of it as part of its workflow. I think this would work best if the robot was typically had an empty queue and you could just clear a table and place it directly in front of the robot and walk away.
There's lots of brief moments of downtime in a restaurant to do stuff like shuffle a tray or two over for the robot.
This is just the first version of the technology. It could get much cheaper if manufactured in volume, and it can get faster as well. Rule of thumb is that 10x the volume cuts the price by half.
Cobot prices are dropping. This article claims $20K for a mid-range unit.[1] Nala shows two robots, one at the dirty end and one at the clean end of the dishwasher.
Dishwashing is a good opportunity for robots. There are many potential customers for a relatively standardized product. It's much easier than automated cooking.
There are other dishwashing robots. Useful for cafeterias, maybe.[2] Cute, but not too useful.[3] So far, none seem to be deployed much. But that will come.
Even according to the link you posted [1], you need computer vision so the price would start at 35k
The 20k cobot would be the "blind" kind that is only useful in fully automated lines thst deal with the same type of product, not a dishwasher with a lot of variables
In 2003, PV panels were a pretty darn mature technology. The technology was decades old. Modules cost about $5 a watt, one twenty fifth the price they were in 1975. More than two gigawatts of them had been installed worldwide. (Millions of panels!) No way could they fall in price by half, right?
Surprise. By 2010 another 38 gigawatts of solar had been installed, and the price per watt was down to $2.32. No way could they fall in price by half again, right?
Surprise. $1.02 per watt in 2012, and another 61 gigawatts installed. $0.52 a watt in 2017. $0.26 a watt today.
Just in 2022, the world installed 86 times as much solar as existed on the entire planet in 2003.
If you build a lot of something, it can get very cheap indeed.
It's a service - $3000/month includes hardware and support.
[1] https://nalarobotics.com/spotless.html