I'm not saying vinyl is a bad thing, only that to say it will outwear leather is a very uninformed comment. The new vinyls are head and shoulders better than the crap that was used on the 40's 50's 60's 70's and 80's car seats, and vinyl is infinitely easier to work with. It comes on a roll, is easy to cut, is extremely consistent and looks good when done properly. Leather requires a lot more skill to work with, and if you make a mistake, it can be an extremely expensive mistake.
The pictures are of some seats from a '71 Roadrunner which were done in black automotive grade vinyl. They look great, but they can't compare to real good quality leather.
No one lives forever, the trick is creating something that will.