100% this technology was invented by Tesla and can be built, however achieving it would take a lot of time, money and brain power. The first major hurdle would be convincing electrical engineers its possible then circumventing the establishment that would try and stop you every step.

To recreate it one would need to retrace Tesla's steps, which in today's age would be VERY expensive. Millions of dollars would be required to reproduce the experiments just to find the proper frequencies and configuration. This was the purpose of the Tesla coil. It acts as a giant high voltage high frequency radio tuner that can adjust ALL components; frequency, voltage, amperage, etc. Once able to resonate with the Earth you then need to convert the power and transmit it wirelessly to the ionosphere, then make it usable on the other end using a resonant receiver. Each acts as it's own component of the circuit; Capture>Convert>Transmit>Receive. All of which do not exist in our current electrical engineering. A lot of components we have are very similar and coincidentally all are Tesla's inventions such as radio transmitters, receivers, generators, alternators, sparkplug coils, capacitors, and Tesla coils.

If I were to make a guess, this hasn't been tackled by big corporations yet because it eliminates the need for the majority of existing infrastructure especially in the form of powerlines, substations and power plants. Trillions of dollars of private and public infrastructure would be rendered useless, it's part of the reason why Tesla was not allowed to finish. Another reason is the fact that the FCC banned the use of the frequencies required. One would have to perform the tests illegally then convince the FCC to lift the ban and most likely pay to register them (Most likely banned because they know how they can be used).

Glad to see Tesla finally getting the recognition he deserves, he is directly responsible for today's electronic technology in nearly every form. I couldn't imagine how he would implement the internet and electronic controls we have today, he could probably shrink the size and cost to be insanely cost efficient.