How do you find Control Panel without Metro - right click where the start button used to be and select it. Or add the icon to the desktop.
You can close a Metro app by dragging it downwards.
The various finger gestures have consistent mouse equivalents, but it takes third party websites to summarise them properly. The information density of the MS documentation is worse than Metro apps!
One trend I've noticed with recent MS products, and I include Windows 7 and the Ribbon in this, is that it is less obvious what to do when just playing around, but if you know what you want to do it's easier to find it. I wonder if this is the reason Alastair finds Windows 8 better when doing 'real work'.
However on the retail side, and against tablets, it has to impress the customer when they play with it in store. (Unless you don't stock it in shops...hmmm)