If you can figure out how to recover from a virus then you have enough technical smarts that there is going to be very little learning curve on a Mac.
Two years ago I was headed to the UK and before I left bought my dad (~61 years old) his first Mac. There was no way I was going to be trouble shooting all of the problems with a PC from across the pond. "Son, my desktop keeps changing on its own" or "Why can't I set my internet homepage." He had very little trouble adjusting and really enjoys it now. No more registry edits or other things that a normal user should ever have to bother with. It works for him. He can ebay, do email, Word, and video chat with the grandchild.
Here is a good website that will help you get acclimated to the Mac before ever getting one:
http://www.myfirstmac.com/. It has great how-to articles on how you do things on a Mac that you are used to doing on a PC. I would also recommend going into a local Apple store if you have one. You can play hands on and ask all sorts of questions to the guys there before buying one.
To me it's all about time and ease. I work on computers all day long. I have less time at home then anywhere so I don't want to have to "work" on my computer ever to make it work. My first Mac was back in 2003 when I was graduating from college. I now have 5 running (2 MacBook Pro), disposed of 1 (RIP iBook), 3 iPhones, etc. Now not all of those machines are new, they last a long time and don't need a lot or any maintenance or updates to continue running recent software or perform tasks quickly.
That's enough from me. If I haven't boarded you and you have specific questions drop me a line at morowe @ mac .com.