Why do those technology companies keep bringing out different things?

Companies grow and evolve

Do you notice how Apple and Microsoft keep putting out new products? Dell has new computers. some are all in one, There are new styles of monitors. You can see two whole monitors at one with some software. Windows keeps upgrading. Why all these changes?

So what about us? What about human services?

Why do those technology companies keep bringing out different things? Do we need to do that in human services? Do we need to evolve and grow?