I have no problems with the Metro UI on phones too (where it belongs, frankly), just my theory why it isn't selling as much. Actually, I wish it well. If WP7 would have been a runaway success, maybe MS wouldn't do PR stunts like Win8.
XBox is Metro-ish too, so you'll have to explain that. WP always has had an uphill battle, especially when you had phone salesmen trying to convince you you didn't want it (I personally ran into that at a Sprint store).
Microsoft is also developing WinRT (as an API) for a pretty good reason. WPF turned out too big and slow. I personally expect WinRT and WPF to merge later on down the line, and WinRT to come to the desktop.