We just keep sinking further and further. 20th century was terrible... Genocide, widespread famine, wars sprawling the entire world, surge in imperalism, etc. We're doing even worse now, what with cloning (YOU ARE NO LONGER UNIQUE), material obsession (actually started with the Baby Boomers, but it's starting to escalate beyond the arrogant hippie phase), premarrital sex, loss of family values, terrible work ethic.
Personally, I think Jesus will come back in 2034 or some time around there, 2000 years after dying on the cross, and hopefully setting us on the right path. Human innovation has pushed us away from the welcoming natural world. But, if he doesn't come back by then, I think 2100 will just be a giant computer everyone is plugged into, because that's what everyone wants, right?