Utter turmoil or a country which will strive forward, what will the future hold for the country after this coup?

I should imagine holidays there will come down in price

Loads of innocent people will die, loads of not so innocent people will die, someone will make a fortune by selling weapons.

Egypt is going to be a two-party system. The Facebook party and the Twitter Party. The winner of each debate is going to be who can gather the biggest demonstration making the most noise.

Instagram?

The BBC reporter the other day made the comment (in so many words), the Muslim Brotherhood were unable to organise anything while in government, but they can get a mob together.
That's the problem in a huge swathe of the world and the main issue in Egypt. They lost the point of government and why the people wanted change. What was needed was economic reform, what they got was the Muslim Brotherhood who wanted to set up an Islamic state.
I suspect the winners of the last election were planning on never giving up power, but we will never know now.

What worries me is that, although the army have said that there will be another election, what happens if the Muslim Brotherhood or someone aligned with them wins it again?
Do they keep having elections until a secular-based party wins?

I suggest the problem wasn't with them winning the election, but with what they did afterwards.

But if the next election is to be 'free and fair', they can't be prevented from standing again. I don't know what percentage of the Egyptian population are Muslim, but there's at least a chance they could get in again. What then? Another coup?

I think the issue is wider than Egypt. The Middle East demographics mean there is little prospect of meaningful employment opportunities being created for millions of young people over the next decade or so. That will inevitably mean instability, bloodshed, possibly terrorism, posssibly migation on a historically significant scale. At the same time Europe, with a different demograpic profile, has mass youth unemployment including among graduates. In previous generations, this would be a recipe for war. I suspect the Arab world will start fighting one another and maybe the "West" may get involved but only if other major powers are willing to accept such involvement by the "West".