Having installed Win8 Dev Preview on my desktop, non-touch Vista machine...
I am being driven up the wall trying to figure out how to close one of the metro apps once its opened. I notice that the "charms" side bar does not come up when I move the mouse to the (total) right side of the screen, and further, when I go to the bottom or top edges, I actually have to RIGHT click with the mouse to have those app bars come up (took me a while to figure that out - that made things even worse).
I am hoping these are bugs, but I would count it a really really bad move to not allow people to close apps! Sheesh! Very often you want somethign closed. You also don't want an extra app in the flipping through mix if you're done with it. Please tell me this is not by design??? Till now, the only thing I can do is go to desktop and by taskmanger kill opened metro apps. Also, the system seems to seem something wrong with it too, bec on shutdown, it notifies I have opened apps that I might loose info on ... but there's nothing else I can do to shut the darn things down! Requiring an always immersive state is already getting very risky, not letting you close the apps (no x button to kill it, anywhere ever) would be ... I hope it is just a bug, let's say that.
Thanks for the help.