I will summarize in two words the future of solar energy, VERY PROMISING.
Why is it explained below.
Solar energy has been used since ancient times. In Mesopotamia, for example we know that the priests lit the ceremonial fire with curved mirrors of polished gold in 2000 BC also said that Archimedes used mirrors to sink enemy ships diverting sunlight towards them.
In more recent times by the year 1930 they became popular in Japan solar collectors to heat water, but the low cost of fossil fuels at the time relegated quickly to solar energy.
It was not until 1973 when OPEC oil prices shot and solar energy back to the world map, since that day has been steady growth.
Today in the early 21st century, the energy future is more promising than ever.
A part of that oil prices have soared in recent years, thanks to predicted it will end in the next 20 years, the population has generally realizing that unless we take action on global warming, our grandchildren they will have a promising future.
Every day more discoveries to improve both efficiency rates of solar energy are made, and while the prices of fossil fuels will not stop rising, prices of solar energy will not let down.
So if you were looking for was whether the solar energy has a promising future , the answer is a resounding YES, solar energy has a promising future, and the more people we use the know and have a brighter future and faster.