Linux won't be easy to use until 1) they standardize on a single user interface (no more KDE vs. Gnome) and the OS gets Advanced Configuration and Power Interface (ACPI) automated configuration support.
That's simply not true. It's easy to use today. In an ordinary office environment the workers never get involved in exotic issues, they just do the job. Linux works just great. It is easy to set up (nowdays) and the applications are as easy to use as are Microsofts.
>until 1) they standardize on a single user interface (no more KDE vs. Gnome)
That has nothing to do with anything. When a company selects one interface, that's the end of the issue. And they both work fine.
>and the OS gets Advanced Configuration and Power Interface (ACPI) automated configuration support.
Now that's just silly. The vaaaast majority of desktop users do not even know these features exist, or if they do, they don't know what they mean. A total non-issue.
I've been using Linux on some machines from the very earliest days, and while it is not for everyone, it IS ready for prime time. The only potential issue you have anymore is the variety of software, and it's maturity.