1. Better water rendition and variation (different colors according to areas (deep blue in ocean, sandbank, tropical ambiance near island's coast,...) 2. A world weather engine who make weathers transitions smooth (i hate this change from CAVOK to scattered during approach grrr) 3. An online multiplayer mode that matches LAN mode in terms of quality (others simmers seen with planes present inside aircraft files (with moving flaps + landing gear, condensation in high altitude, smoke during touchdown .... (but ok, that can be the role of those online networks)