The word simulator wasn't part of Microsoft Flight.
This new one is bringing the old name back - Microsoft Flight Simulator.
I have a hard time believing it's not going to be the real deal. Also, the picture so far suggests they've been working on this for quite some time. All the past ones weren't truly new from the ground up, yet look at how much work went into each iteration.
I bet this took 10x as long to develop than FSX did...