Tech: Time viewing. See: The Light of Other Days [Arthur C. Clarke, Stephen Baxter]<p>Horizon: Never. Why? Wormholes don't do that.<p>Tech: Near infinite storage for nearly free. I'm pretty sure that in my lifetime most everyday people will no longer delete files or care how big something is.<p>Horizon: 10 years tops. Why? Moores law for data storage.<p>Tech: FTL<p>Horizon: 50-100 years. Why? I have a sneaking suspicion that there's some radical new theories about space and time just around the corner.<p>Tech: Androids<p>Horizon: 20 years. Why? Almost all the pieces are already here.<p>Tech: Artificial human wombs<p>Horizon: 15-50 years. Why? Kinda already here, just needs moral/political support
Anti-ageing therapy i.e. lifespan extension (also related to medical science as a longer lifespan also requires dealing with other health issues like cancer). The technology for the first iteration of this is probably quite close, within a few decades or by the end of the century at the latest.<p>It's a thorny issue though. People are afraid of death but paradoxically this sometimes manifests in resistance to any efforts to address it. I think people have difficulty dealing with the idea of life extension in an equanimous manner, as the concept of death is loaded with fear.<p>So there will be arguments against it from many perspectives: psychological, philosophical, economic, religious and so on. These arguments can have merit and warrant due consideration but I think that fear and pessimism should be balanced with hope and optimism.
Free or very cheap sustainable energy. This would be a catalyst for a whole range of new inventions.
Combine this with a more scientific driven earth under 1 government in a society that rewards reaching ones potential to get towards the Star Trek type society.