which could lead to a feeling of 'why not us, too?' in some countries with oppressive regimes.
The problem is, these oppressive regimes aren't likely to sit around, waiting to see what happens - they'll be ready with the means to deal out swift and violent deterrents.
Egypt has (so far) seen a relatively peaceful and painless transition from oppressive dictatorship to military rule, but the country isn't out of the wood yet, there is still time for the power vacuum to attract contenders eager to seize control. Elsewhere in the world military governors have been notoriously reluctant to relinquish power, once they got their hands on it.
Boxes were ticked quite rapidly in Egypt,once the thing started, but that is not likely to happen quite so easily in Iran, should a similar bid for democracy take place. There would be bloodshed, and a lot of it.