To me, Lion really cemented the fact that the end goal of Mac OS is to make an invisible OS that requires zero tinkering just like iOS. Everyone should be able to use it and no one should have to access the file system.

This transitional period poses a huge problem for Apple and looks to be the cause of most complaints I've seen. What are they going to do about the power users who were their early adopters? Is an 'admin' or 'power user' mode appropriate?