This seems to be shaping up to be a full-scale coup d'état by Hezbollah with the support of the army. It looks like they're going piece by piece. Future was first, now the PSP is being taken in the Chouf, and I imagine the Lebanese Forces in the Christian sectors will be next.
The rest of the Lebanese parties were no match for Hezbollah, but when you throw in the army, what can you expect? Hariri and Joumblatt seem to have agreed not to fight, probably to save the bloodshed that would not have stopped the coup in any case. So they've agreed to go quietly in exchange for there not being a battle to which Future and PSP partisans would have gone like lambs to the slaughter.
The army seems to have cut a deal with Hezbollah, but it's hard to say what they could have done in any case, since they're so much weaker than the Party of God. So the current government will most likely be forced to resign, Suleiman will be appointed as president, and someone pliable will be appointed to be Prime Minister. Things will be like before 2005, except that instead of taking marching orders from Damascus, the new government will answer to Harat Hreik.