"The army and the people in one hand, the army and the people are united." -- chanted Thursday in Tahrir Square.
When Mr. Mubarak and Mr. Suleiman spoke last night, the die was already cast, the military's soft coup was already underway.
MSNBC just cited a senior American official saying that the military splitting from Mubarak last night was the key precipitating event for today's resignation. The military believed that Mr. Mubarak would resign last night -- Richard Engel says the military was "furious" that he did not. Senior officers of the military threatened to shed their uniforms and join the protesters.
Now the Supreme Council of the Armed Forces has taken effective control of the country, until free elections can be held. The Supreme Court may play a role in temporary government as well.