Actually, I think so.

Time passes and people change beliefs...

I think Darwin once said that change was the only constant in this world and he may indeed be right, in the end the world consists in a countless variety of parameters and thus it is impossible to predict the future. However, if you mean the Obama hype for instance I would strongly doubt that he is going to change much and he has shown this already by his selection of a very reactionary staff which more or less contradicts his "Yes, we can!" sentence. And due to the financial crisis as well I dont think much is going to change in the long run, at least nothing really fundamental. In economy you might see some sort of Neokeynesian uprising, but I doubt this is going to last for a long time. So in fact we are in a period where people are longing for change, but I dont really believe that a real fundamental change is coming soon.

Change is the only constant.

doesn't change occur everyday? otherwise, why would today be different from yesterday?