What new technologies have just appeared now, which few people use yet?

Question

PHP

That is, those that are now still in their infancy and which are still unknown to many, only to geeks. Promising in your opinion.
The question of whether they shoot or not is not worth it.

Answer 1

TS, your solution works too,
but
it's just sort of the other way around.
judging by your date formats it is possible through int.

Answer 2

usort($array, function($a, $b) {
  $a = str_split($a['date'], 2);
  $b = str_split($b['date'], 2);
  $monthDiff = $b[1] - $a[1];
  return $monthDiff ? $monthDiff : ($b[0] - $a[0]);
});

Answer 3

development and operation of quantum computers.
a little closer to reality - blockchain technology.

Answer 4

indoor GPS.
Position accuracy +-1cm or less. The girth area is 1km^2.

Answer 5

New technologies and approaches appear in all areas, you can take any and work with advanced technologies there. If we take directly the super new sphere, which did not exist before, then as a rule there are no markets there, they still need to be formed in order to pay for these new technologies.
Robotics is very promising as a market and the technologies that are used there, but the mass market has not yet been formed. Perhaps there is something you can catch.
A lot is being developed in biotechnology, it is also considered one of the most promising areas and with advanced technologies, but it is still more vague than in robotics.
Finance - well, something new and interesting seems to be brewing there, there is a direction related to cryptocurrencies - how promising is this, the question is. I now think that this is an empty direction with zero exhaust (pyramid).
Well, of course, machine learning is now a topic that gives real output, and is used almost everywhere (replacing the usual automation for data analysis). Without machine learning, you can’t get into any cutting-edge area.

Answer 6

Here is your main question. Only it is more about startups / business.
Everything that was described to you above, all these technologies are in their infancy, many have not yet been revealed / or have not burst.
We would like to master this field, and you are looking for something new.

Answer 7

Homotopic type theory. That is, theories of dependent types have existed for a long time (although they have only just matured for real application in programming), but the idea to apply the methods of algebraic topology to them is quite fresh. They are more trying to be used in the foundations of mathematics (checking the proofs of theorems), I heard about their use in IT only once - to analyze the properties of SQL queries.

Answer 8

The question of whether they shoot or not is not worth it.

If investors knew the answer to this question, then we would not have startups, failed startups. And there would only be successful companies with a lot of money