This is a great news indeed! I think it is a win-win situation for the both sides. For bitcoin, obviously if a country legalized then it will create curiosities, erase doubts,  and attract investors because there are still unnecessary mindset of some people about bitcoin. For the two countries, first is Uzbekistan, it might help the country to somewhat decrease the gap of rich poor gap and will help their economy and for Iran, it will create more miners because as we all know, energy in Iran is not that expensive compare to other countries.