I went back and looked at old demos for Bioshock Infinite and I can see why the game was delayed a few times, they radically changed it.
Almost nothing in this 2010 demo is in the game in any form (other than the weapons, handyman and the crow and electric powers)
This is much closer with segments that actually occur in the game, however the story must have changed late in development as it appears to focus more heavily on patriotism as the theme of the game (which does still exist in the final product) but religion, which is the driving force in the final game city does not exist anywhere (no posters of the prophet etc). The Lincoln mask is the most indicative of this, he is celebrated here with a mask, but is vilified in the final product. The celebration of the US and the founding fathers is a bit odd to have remained prominent in the final game as Columbia separates from the states, as the city rejects what it has become.
I was a bit disappointed by the lack of dynamic social situations, factions and impactful choices that were promised throughout development (eg you could save a man from an execution but he may turn out to be a terrible person later on).
Do you like the changes that happened from the first shown media about the game?