So the website was updated now Q1 2018 for mainnet, not December as it says in the title of this thread.
Watching the vlog did you ever see a more self-absorbed, out-of-touch group of people? It's all beards and bro-fisting, dizzy with conceit after all the millions they raised to support their new jet-set lifestyle, which is excessive and inessential to this kind of software project.
The reason for the delay? They want to give time for people to swap their coins. Bullshit! Q1 = 3 months. It won't take 3 months to do that. Eth is at all time high which means anyone who invested in Nimiq has lost big, while the money they took in the ICO just keeps growing like one big huge sushi plate.
Tezos is getting sued, other projects that break promises will follow. Being a skateboarding hippy with your head up your ass won't protect you, nor will a Swiss foundation.
Patience, the project has lost none of its potential.