I think this got noted elsewhere, but now can't find it, so I'll risk posting it again. It's not that often that a brand new flight sim gets announced.
It looks like the guy that does the FSX / P3D / XP VR plug-in has decided to do his own 'FSX Compatible' flight sim of his own. The name for the product is still to be decided, but so far the site is:
It doesn't seem to be lacking in ambition, and he obviously has amazing technical chops as shown with FlyInside VR.
Coming Holiday Season 2017
Modern and scaleable
FlyInside's flight simulator is the first flight simulator designed for today's PCs. Take advantage of 4-8 cores, max out a 1080 Ti! Turn down settings to maintain smooth frame-rates even on older laptops.
High quality photoscenery, layered with buildings, trees, and world objects. An advanced atmosphere simulation. Huge draw distance. Your flight simulator never looked this good!
Load hundreds of existing aircraft from FSX.
No overbearing EULA. Add-on developers can create, sell, and give away third-party aircraft, scenery, and plugins. Unique in-game editor for flight dynamics, scenery, and materials - faster turn-around than ever before.
The compatibility with FSX is huge. I wonder how legally minefieldy that is? I believe Dovetails (with their new Flight Sim World product license) holds the original FSX IP for the consumer market.
Here's some first screenshots from the flyinside forum on the new simulator (I guess demonstrating compatibility):
It's getting to be quite the flowchart of which sim to invest in nowadays. I guess a new entrant where you can use your existing scenery/aircraft but it built on a clean slate could be a way into that decision process..
EDIT: Found the existing post - sorry @Brix - http://forums.mudspike.com/t/p3d-info-thread/2957/142?u=fearlessfrog