Small scale production of unique goods can be feasable and profitable if everyone can access massive databases of product information that is responsive to wish lists no matter how vague or poorly worded. For the home, we could be looking at home automation beyond Star Trek levels. More than that would be the ability to find out instantly who produced the eggs you buy and their track record before you purchase your next dozen. Such things will need leaps in computer processor evolution. It will need them to become a whole lot smaller and less power hungry as well.
Computers have a century or two before their full potential is reached, if ever.
Remember, relativity itself was discovered with the advent of discoveries related to electricity and light. There are still things we don't know. There are still problems with relativity that will need yet another shift in the paradigm just like Newtonian mechanics, Copernican before him, etc. etc. Light is a bit more difficult, but hardly impossible. We have climbed far, and each step we take is bigger than the one before it, but we should get over our arrogance.