My 2012 CX-9 GT with 61,000 miles is not showing significant wear in the driver's seat. It looks sat in of course, but there are no holes or anything that suggests it will give out any time soon. The front passenger seat is in somewhat better condition, and the rear passenger seats are pristine (they don't get much use). I use Armor All wipes every four or five weeks. The seats in my car are leather trimmed, not full leather, and its the same with the new models, even for the Signature trim. The parts of the seat that hit your body are synthetic and will last longer with care.
My expectation is that if I keep the car for its full life (e.g. 15 - 20 years/200,000 miles) at some point I'll need to get the driver's seat reupholstered.