This year at PAX East, Thrustmaster had a VR demo of their HOTAS controllers[1], which are intended to allow pilots to access all critical functions of the aircraft without removing their hands from the controls. It's been a long time since my flight sim days, and I've never had such a strong urge to drop a couple thousand dollars on a new gaming PC. (Thankfully I don't have that kind of money available at the moment.)

Your questions are all valid, and I'm sure the answers vary for different people. There's definitely a market though, and hopefully it's enough to motivate continued improvements in the tech.

[1]: http://www.thrustmaster.com/products/hotas-warthog