Seems to me the future has always been 15 years away, yet usually fails to materalize.
These problems that are being solved are non-trivial. We don't really have the computer vision, the robot dexterity, the high capacity batteries, the fuzzy logic, etc to make this work. We dont have it today and we probably won't have it anytime soon. Heck, we don't even have a useful home robot yet! Where's the Apple //e or Commodore 64 of robots?
If anything makes sense, its to build an automated hotel from scratch, not try to shoehorn in solutions. Self-cleaning toilets, self-making beds, roomba-like devices, etc so that a majority of the housekeeping work is done. In other words make your problem fit the limits of technology and don't be afraid to break from tradition. We didn't build robotic horses in the early 20th century. We built cars with four wheels and we paved down expensive roads to drive them on. Dirt roads passable for horse and buggy were a non-starter for cars. We all just ate up that expense for the convenience of owning a car.
The problem here is that housekeeping labor is dirt cheap and robots are crazy expensive. What's the incentive here to do these things? If there's an industry that's dying for cost savings, it won't be the hotel industry. Now look at, say, unionized auto manufacturers or unionized public sector workers. Lots of trivial easy to automate jobs there. Why aren't city buses driving themselves? Or drones writing parking tickets? Or robots laying down asphalt? Or robots walking a beat? Or teaching a class? That's where I could see some advancement. A lot of municipalities are looking at their retiring baby boomer workforces who negotiated very generous pensions via a corrupt political process and now don't want to fall into that trap again.