So, apart from the conspiracy theories, what is 5G all about ?

While 4G tops out at a theoretical 100 megabits per second (Mbps), 5G tops out at 10 gigabits per second (Gbps). That means 5G is a hundred times faster than the current 4G technology—at its theoretical maximum speed, anyway.

5G networks will boost wireless throughput by a factor of 10 and may replace wired broadband. ... Overall, due to the new technologies, spectrum, and frequencies it uses, 5G has several benefits over 4G higher speeds, less latency, capacity for a larger number of connected devices, less interference and better efficiency.

Although 5G may improve our day to day lives, some consumers have voiced concern about potential health hazards. Many of these concerns are over 5G's use of the higher energy millimetre-wave radiation. ... It's ionizing radiation that is dangerous because it can break chemical bonds.

Most cellular “5G frequencies” (higher frequencies) cannot even penetrate a piece of glass. 95% of cellular 5G frequencies are up to 100x worse at penetrating walls, glass, and buildings so It can therefor not rule out 4G anyway implying we will need both 5G and 4G or find “a fix”.

5G promises to offer significantly faster speeds and more reliable connection to mobile devices than any network before it. That said, 5G is about more than fast internet. The exponential growth in the capacity to carry more data faster will push unparalleled growth in Internet of Things (IoT) technology projects.

With 5G we will increase the data rate, reduce the end-to-end latency , and improve coverage. These properties are particularly important for many applications related to IoT. One example is emerging autonomous cars and intelligent transportation, to which small latency is essential.

5G will require new transmission infrastructure, including thousands of cell towers and tens of thousands of antenna – known as small cells and DAS (distributed antenna systems) – that will be deployed on utility poles and other urban infrastructure

So, in essence I do believe it is a great technology and would enhance dramatically a lot of our capabilities worldwide and even be a game changer in the way we live nowadays. Although it bears its own limitations, so it isn’t all “wow”, and the cost and logistics implications surrounding it are tremendous, making it a bit of a puzzle. Furthermore, to add some spice to the equation it is not a “green” solution at all and many are more than skeptical about its future.