Flying Cars
I know many, many people want flying cars to be a real thing. But, what is always going to prevent us from having true flying cars is, look at how people normally are with the cars on the ground. Drunk driving is tenfold going to be worse with flying cars, people are going to totally fly their vehicles into buildings, for sure. I think the closest we’re going to get to flying cars, is the hover cars we see in Back to the Future II that are more ground level, but hover. Even then, I don’t know if we’re ever going to be ready for them.
True AI
What I mean with True AI is an AI that can actually be a little more sentient and living than what we got now. When AI first rolled out, it really put a damper on everyone in so many ways that I don’t think we’re ever going to see it. There’s just too much at stake to trust an AI with the capability to think on its own and do things on its own. We’re just going to be stuck with Semi-AI that only talk back to you in text form and maybe help you code. And that alone already has ruffled the feathers of millions who are hating AI which is another thing to consider.
Only superficially. It’s really hard to tell what percentage of our DNA is actually useful, or could be useful under conditions we haven’t seen, or is actually a part of any given variation. What we do know, of the number of DNA combinations we have seen if we play out each possible version of those variations there’s around 4^2000 variations. Or in other words If a billion people were born every day since the start of the universe, there would not be a single duplicate person. And this is the extreme low end estimate based on limited data sets that generally don’t even include people of every major region, much less interesting micro-populations that have been breeding in isolation for a thousand years or more.
Now lets assume we remove all causes of congenital blindness. Generally speaking the number of genes making up most identified causes are less than 20 total. That would (simplified, yell at me later math nerds) knock that number down to around 4^1995.
That would still be more viable combinations than we could possibly run through from now until the heat death of the universe, assuming current population growth rates which we’ll have until we invent birthing pods.
In other words we’ll probably be fine, but if we need to, and it’s allowed to be researched more, we could just simply artifically introduce safe variation. i.e. people giving birth to people they aren’t genetically related to anymore.