Worldwide Caliphate - How Muslims view the Arab Spring?

"The West attempted to paint the uprisings as being secular and democratic in nature. Such rhetoric could not be maintained, however, since it was becoming increasingly clear that the call on the Arab street was for nothing other than Islam. (Pictures of crowds chanting in Arabic subtitled "The ummah desires the Islamic caliphate") What happened was that somehow or someway the call for an Islamic caliphate had to be satisfied..." [...]        "We're really living under the Islamic system now...there's no more democracy, no more secularism" [...]There was no question about it. The world was witnessing the end of western civilsation and the rise of a new era under the Islamic caliphate

When I first saw this "fictional futuristic depiction of the return of the caliphate" on YouTube I assumed it had been made by those worried about the spread of that extreme but minority form of Islam that hopes for and demands a world-wide caliphate under which every person in the world, whether they want it or not, would be subject to sharia law. Freedom of conscience, freedom of religion, freedom of speech should be sacrificed to Allah, such people believe.
My Muslim convert friend believes such a world would be desirable and that "democracy plays no part in Islam".
However, this film was in fact made by  Hizb ut-Tahrir, Australia.  I reproduce below the video description:

 Hizb ut-Tahrir, Australia will convene its major annual conference to address these uprisings, what the potential results are, the method for true Islamic change and the false ideas and approaches that will lead only to failure. Hizb ut-Tahrir Australia invites you to join us in not only looking at the Muslims world of today, but in casting our eyes forward and looking towards the Muslim world of tomorrow under the shade of Islam insha Allah.Where: The Bellevue Reception Centre | Restwell St, Bankstown When: Sunday, 16 September 2012 | 10:00am -- 3:00pm

An interesting and chilling insight into the minds of those who strive for and would delight in seeing a world where sharia rules with its medieval punishments for theft, homosexuality, adultery and sedition...such as 5.33 which demands crucifixion and amputation of alternate hands and feet for those who wish "to spread corruption in the land".