Clickable Cockpits would make things slower, you have to use the Mouse to Click a Switch in the Cockpit, wich is something i really dont see you do that easly in the heat of battle, especialy if your using TrackIR because the view moves with your head so you have to chase the Switch you want to klick around the screen
Keyboard or what ever optional controle you have would be much faster because you just press the key you want instandly.
However i wouldnt be suprised if in the near future games get Touchscreen suport, wich would make a interactive virtual cockpit much more usefull especaily combined with Multi Monitor suport.