User blog comment:Knc1w2h3n4c5t/The Sims 4 is NOT Open World - Thoughts?/@comment-77.70.92.2-20140804165858

Watch this video:

https://www.youtube.com/watch?v=LSvjLaqnEFQ

In the end of it he says that they made a combination of The Sims 2 and The Sims 3 and that there will be an open world.