Metro apps are designed for touch screen. If you don't have one (like me), there is no point to using metro apps. The metro apps are terrible to use with a mouse.
However, if you do have a touch screen, I'm sure the metro apps are easier to use then the desktop apps.
QFT (I just learned that shorthand yesterday!)
Quite honestly I'm surprised anyone who is in a non-touchscreen environment uses metro apps at all. I suppose it would still be alright for things like Netflix or YouTube, but other than that, they are really designed first and foremost for touch. You can't forget about the games offered as metro applications, though. I have ilomilo and Gunstringer and they're fun and pretty much require a keyboard to play well.
Although it is mostly possible now (the charms bar is still impossible to disable), Microsoft should really include a single, easy to find "switch" to globally disable metro functionality. I think that would solve most of the gripes people have, and would make a lot of sense for traditional users. My guess as to why it doesn't exist already is that Microsoft needed to push its store to the forefront to get developers to make apps for the platform (everything is measured in "X hundreds of thousands of apps" nowadays for whatever reason). Perhaps Windows 8.1 will introduce this feature now they have a decent bevy of applications to go off of.












