I don't think cs702 is saying that. I'm guessing that he means it's like learning something completely different. My parents and my in-laws already had a ton of grief with changing from Office 2003 to Ribbon, when it came out; They also had trouble with XP -> 7. When they use my wife's MBP, they also have trouble. I'm pretty sure it's not going to be easy for them to use 8.
Change is good. Has to happen sometime. Can be difficult to get used to but thats not a reason to avoid change, just to think about how to smooth transitions.