"How long do you think we'll have to wait before the day comes? God, I can't wait to see the aerial combat of World War 2 depicted in that level of detail..."
There's always IL2, which is getting on a bit, but looks wonderful. There's a very diverse selection of aircraft - including the Ki43, P-39, Beaufighter, Hurricane IIB - and they burn and break up and explode and crash very attractively. The weather effects, cloud etc, are a lot better than those in Aces High, and it feels more accurate (you have to manually raise the gear on the F4F, and there are manual fuel mix, prop pitch, supercharger and radiator settings), but it's less fun to play. It doesn't have Aces High's view system, or its standardised albeit fake cockpit layouts.
But then again the game comes on a DVD, whereas Aces High is a 110mb download. The 1946 version is out on budget. I have no idea what it's like to play online. I believe they're working on a Battle of Britain sequel.