Probably not. The entire reason that the remote-drawing works is that the draw calls are passed through all the way up from the widgets and controls layer; for

Probably not. The entire reason that the remote-drawing works is that the draw calls are passed through all the way up from the widgets and controls layer; for apps that don't use those (e.g. Qt apps, etc.) it's just a dumber VNC (we could make it less dumb, but, a little starved for time right now.) So then you would be porting the entire Haiku toolkit to Linux ... and at that point why not just use Haiku? We have our own kernel for a reason :)