I'm sure many people have completely forgotten this game but I'm sure a release date isn't too far away. I think it's time for this to be on our radar again, so here is a comparison of what it looked like back in 2011 and what it looks like now:
2011
2015
Here is the official Witness site for anyone interested:
http://the-witness.net/news/2015/06/polishing-the-architecture/
The PS5 Exists.