> keeps producing markets where the available choices are only skin deep Because it turns out that catering to minority demands only works for some markets, bu

> keeps producing markets where the available choices are only skin deep Because it turns out that catering to minority demands only works for some markets, but not others (i.e. all cell phones look and function the same, but there are dozens of different flavors and textures of peanut butter). And also, because it turns out that convincing the customer base that what you offer is what they want is easier than making the things they actually want (mostly because people rarely know what they want in the first place). Also, all three examples you mentioned have fairly straight forward reasons. There are no physical keyboards on phones because most people prefer more screen space and a keyboard takes space. There are no "dumb" TVs because people prefer their appliances to work out of the box and that is exactly what the "smart" TVs provide, you don't have to plug them into any other device to get them to show you content. And cars have been pretty standard for a while now, there might be some demand for a car with a dildo shaped joystick instead of a steering wheel, but maybe not enough to warrant actually making one.