i hope they include stuffs to make easier for the one who builts virtual cockpit or virtual homemade console
for example a way out to built a moveable cockpit, shakeable,an interfase which detect the horizon respect to the cabin

 Everything Gabe said ("I would like to see more improvement in ATC.  I think this is something they can do without cratering frame rates.  I would like to see holding instructions, SPEED RESTRICIONS, we have altitude, now lets have speed, better spacing, but get rid of the 40 mile vectoring to final.  Maybe 10 to 20 miles of vectoring.  I would just once like to fly a published STAR into a airport without being vectored off a third of the way into the STAR.  When I request a change of runway, let me land on that runway and not ask me to fly the approach but land on the original runway.   Declarie emergencies.")  is what I want.  I also think on 2 crew aircraft they should give you a co-pilot or beable to be the co-pilot where you set what they are to do durning the flight( like gear up/down, flap settings, take over flying or setting auto pilot settings, radios especially on long flights if you do not want to sit there the whole time) just like you do in real life, pilot flying and pilot not flying responsibilities.  But if anything what Gabe said about the ATC.  Cheers!
Oh yeh one more thing.  Get rid of the flat airports.  I would like to see elevation changes in the runways which most runways have.  I know that would take for ever to re-do all the MS airports and have the aircraft not bouce or crash with the change in elevation(like the downloadable uneven runways in the mountains cause it is a sharp ridge everytime the elevation changes) but it would be awesome.  The last one is kind of just dreaming lol.