The total amount of energy generated by solar tech in the world now is less than 2%:
https://en.wikipedia.org/wiki/Solar_power_by_country
So if the actual trend to generate all the power with solar continues (and of course also store the energy with batteries) the request for solar panels will only increase. Time will tell who is right... ;-)
Btw "genius" referred to EM was obviously sarcastic... ;-)
Please do not associate solar tech with EM (the con) because the first is our friend but not the second. Solar tech is a decentralized tech i.e. it is wealth distributed to everyone, but EM is just a parasitic entity whose purpose is to increase the public debt and pocket as much as possible for himself with the excuse of solar tech.
Solar won't make major headway without govmint help to the actual consumer. For a very small amount of solar you could provide pretty much all of your lighting, some help with cooling, charge up your phones and computers, you can already get a very big bang for teh buck it you do the work yourself. "If" teh govmint stepped in and said that they would give you $5000 in solar tax credits (not write off, credits) then solar woul dtake off. it would reduce out energy dependence, lots of good would come out of it. In the end it will "likely" just have to get cheap enough to do it on your own. It's definitely heading that way. No solar boom without govmint help to the sheeple...not clowns and corporate dick heads like Elon. The chances of getting a govmint subsidy like that are slim and none I would say. The windup? >>> Wait for solar components to get even cheaper.
Solar and wind is now either the same price or cheaper than new fossil fuel capacity in more than 30 countries, according to a new report from the World Economic Forum:
http://www.independent.co.uk/environment/solar-and-wind-power-cheaper-than-fossil-fuels-for-the-first-time-a7509251.html
Solar power, for the first time, is becoming the cheapest form of new electricity:
https://www.bloomberg.com/news/articles/2016-12-15/world-energy-hits-a-turning-point-solar-that-s-cheaper-than-wind
and the price will be much lower in the next years.