Much ado about nothing... What happened next was that Rohani got egged and shoed when he returned from New York! According to Reuters, a small contingent of 100's of people showed up to the airport to cheer his return. An even smaller contingent of hardline protestors threw shoes and eggs at his car and shouted "death to America"! Either way, it shows the level of disillusionment of the general population in a country of 70 million for just "hundreds of people" to show their pleasure or dissatisfaction with possibly the most important foreign relations development of the last 35 years.
What happens next is most likely going to be even less nostalgic to the general population. Corruption is not going to go away. This Muslim first, Iranian second mentality is not going to change, Abadan's not going to become more important than Gaza, road fatalities aren't going to drop, water management issues aren't going to get resolved, and the conversion of the population to addicts in large numbers is not going to reverse and the poor aren't going to become middle class, the middle class aren't going to become rich and the rich minority sure as hell aren't going to stop living off the back of the poor and the small middle class - not any time soon, not ever under the IR. The IR in all its glory will only be as good as it was under the first two years of Khatami, because that's all its capable of being - that's all that its structural make up allows. And that realization is what led to the student protests and the crushing response all those years ago.
That's of course the most optimistic prediction, that the economic problems are non-structural and will get resolved somehow and that the IR will just tag along, like it has for 35 years, just above the breaking point of the population. Under any less optimistic scenario, the economy will continue to slide and some or all of these issues will get worse, eventually culminating in an implosion among the ranks and explosion in the populace. It would be a mistake to compare Iran with China - the latter fully appreciates economic ingenuity and privatization, foreign investment and the existence of, and conversion of the poor to, the middle class. The latter has been in the death spiral of non-privatization strengthening a certain group and hell bent on not having a middle class that would become an existential threat - after all economic is for donkeys. The best Iran can be under the IR in every aspect is the soviet union of the 60's and 70's. If Sepah (i.e. the communist party) did not control every aspect of the Iranian economy or society, it would be a different story, but they have absolutely no reason to give up that absolute power IMHO.