We replaced a 2007 X5 4.8i with the new 2014 X5 sDrive 35i model year and it is a much improve vehicle. Key areas of improvements for us are:
1) Idrive & Connect Technology - Voice command is incredibly accurate and easy to use.
2) Interior quality & refinement. Seats, instrument cluster and leather dash are higher quality material & overall design.
3) Ride comfort & Handling. You can still feel and have the legendary BMW style handling and road manners, but harshness is all but gone, as compared to 2007 model year. The car feels much lighter and agile than the previous model.
4) LED Headlights are impressive in looks, brightness and visibility while driving at night.