Cars aren't a new invention either, and yet people build new ones. There is an existing market, it is large. Making a product for that market that is just simp

Cars aren't a new invention either, and yet people build new ones. There is an existing market, it is large. Making a product for that market that is just simply 'really good' has potential to make money. Almost all great computer companies started into markets where things already existed that were comparable.