Now, that would be interesting to me, to dream of the past. Sometimes dreaming of the future isn't the best in regards to wishing we had technology to travel the galaxy instead of only as far as the Moon.
Technically, it is a necessary component to developing artificial intelligence, but it basically allows an immense amount of data to be processed within a few seconds. Instead of the internet, we had the extranet in my dreams, which encompassed news and information from countless inhabited planets. Quantum computing could search all of that information within seconds to give you relevant information to what you wanted to know. However, AI research was illegal, though it didn't stop some people from developing AI, it was just few and far between.
Though quantum entanglement is what was most widely used. Quantum entanglement allowed people to communicate across the galaxy with little to no interference. It also allowed for secure communication that was far safer than anything we have today.