The first idea reminds me of the movie "Déjà vu", with Denzel Washington, in which the protagonist drives a car on the highway while he's seeing the past through his goggles! I don't know who came up with that idea, but it's genius.
The second one, we've been talking about recently. I was considering "tunneling" physics information from Stunts through DOSBox out to the host system like it was done by another Stunts fan, who managed to have two cars play together through sending each other's information and placing it in the opponent's car. Daniel3D and I suggested back then that this tunneling could be used to play with my graphics engine without having to develop a physics engine, but it really isn't a comfortable thing and it's not easy to do because the input still has to be sent to DOSBox. Yet, if it were easy, it'd be a very interesting experiment.
The second one, we've been talking about recently. I was considering "tunneling" physics information from Stunts through DOSBox out to the host system like it was done by another Stunts fan, who managed to have two cars play together through sending each other's information and placing it in the opponent's car. Daniel3D and I suggested back then that this tunneling could be used to play with my graphics engine without having to develop a physics engine, but it really isn't a comfortable thing and it's not easy to do because the input still has to be sent to DOSBox. Yet, if it were easy, it'd be a very interesting experiment.