We are certainly not medical people nor qualified to give medical advice, but I have to agree with Chuck. If you were not feeling that your other hip was a problem (which is the impression that I got from your post), and you are scheduling surgery just based on X-rays, I am not sure that having surgery at this time would make sense for me unless the X-rays show something unusual that may cause problems if you wait. While it is true that most resurfacings work out great, complications happen which can sometimes be very serious. If you are not experiencing fairly serious problems in your life from your natural hip, you must take a good look at what justifies taking on the risks of major surgery before you need to. I have few friends who are orthopedic surgeons and who do joint replacements for a living, and even though they limp around on joints that x-rays show are "shot", they continue to postpone surgery on themselves as long as they can still do the things they love with the help of medication; a perpective worth considering.
To me the bottom line is that the X-rays can confirm it, but your personal experience with your hip is what tells you when it "is shot".
Good luck on whatever your decision, but make sure that it is yours, and not something that you were run through while you were "shell shocked".