very interesting to know where we are and where we are going.
I am quite optimistic about what will come, I think that all the previous development, although great, converges and will become exponential in subsequent decades since this disruptive stage in which we find ourselves, technology is not an option, it is a necessity to facilitate everyone's life

Energy :
solar wind wave energy etc. It will be the most demanded, there is a hunger for friendship with the environment.
The new generation z dreams their houses with clean energy.
In the stock market we are seeing this sector rise, amid speculation and the need for this type of energy.

Information :
Artificial intelligence will be able to move all this information, associate it and obtain results instantly, and that is when the data speed (latency) driven by 5g will play a crucial role. or the 8g in the future as you mention.

Communications: In the following decades we will see incredible advances, we may not even use a device as such to communicate. (companies like neuralink give me expectations towards an incredible future)

Water :
Let's hope desalination projects flourish,
We recently saw the water go public.

Transport:
Change is eminent, air vehicles, autonomous driving, these are topics that are being worked hard.
I still think the cities collapsed with the current system and the environment does not resist anymore,
adding that additional dimension z in our cities for interurban mobility, it will be a thing of the past to spend hours on a highway.