I don't know the exact hardware specs but you can test Aerofly FS 4 for up to two hours on Steam and get a refund if it's not working even on lowest settings. At least that's the Steam policy for products as far as I know. Aerofly FS 4 runs best on graphics cards with at least 4GB. With only 2 or 3GB you probably won't be able to load any city buildings, trees and stuff like that into VRAM.
are there any plans to bring emulator support back in future?