Solar with storage will become ubiquitous when the price point on the storage becomes low enough. The panels themselves are right on the edge of mainstream viability right now, and the technologies involved are getting cheaper and more efficient all the time and unlike most other energy production methods, can be successfully integrated into existing urban architecture.
It's hard to take those graphs seriously when they are not logarithmic, but I see your point.
Also, comparing to oil is terrible - they should compare to electricity instead which has hardly changed in price.
And if the price is really falling so well, why are we pushing things? Let the price keep falling and people will naturally switch, with no need to subsidies.
Speaking of - does that price take into account subsidies?