a better shower

Clearly violating the DRY principle, taking a shower typically has the following problem: You need to figure out the right temperature, usually by trial and error.

The better you know your shower (i.e., the more often you have used it), the shorter this process will eventually become as you intuitively develop an increasingly accurate heuristic. Still though, with most common showers this temperature setting phase never goes away and your results are never consistently the same or consistently quickly achieved.

The better shower then would have to improve on this. Maybe you enter the desired temperature and then simply turn on the water. Maybe it could respond to voice commands. Perhaps each user could determine (again, by trial and error) the desired water temperature once and the shower would remember the setting in the future.

Similar features could be implemented with regard to water pressure, of course, though personally, I find the temperature adjustment more urgent. I wonder if there is such a thing out there already and at what price.

Update: Kohler appears to have something to offer, according to Kohler DTV Delivers High-Tech Shower Experience. Not inexpensive, of course.