Can this somehow beam power in such a way that we can direct it to the parts of the planet that are currently in the winter and need it for heat?
I didn't find a mention of seasons, winter, cold, heating. (I skimmed the beginning of the article.)
The biggest obstacle to solar is the seasons: We use the most energy in the winter (for heating,) but most of the sunlight comes during the summer. There are locations in the far north where there is simply no sunlight at all during the "day."