Today Dovetail Games released an update for former Microsoft Flight Simulator X. This new version is branded as Steam Edition and is currently available for 5 USD/EUR. Compared to the original, released in 2006, FSXSE is Windows 7, 8 and 8.1 compatible.
The power of FSX is the addon compatibility, giving hundreds of features, landscapes and planes. I hope its just a matter of time before high-quality DLC will be available in the Steam Store.
I personally am glad to see this game being updated and make compatible with actual Windows versions.