There is one country that might have the greatest ability to generate solar power, yet it's still not used, Algeria has one of the biggest deserts in the world and the power generated from there could be enough to get rid of a lot of oil generated power.
For a long time, space is not going to be the limiting factor and "small" deserts like Isreal's are sufficient. The limiting factors are more likely infrastructure, logistics, skilled workers, the local energy market, and so on. For these reasons, Algeria is not really in a better position to implement large-scale solar than many other countries.