People can say they don't like Win 8, but you can't say it isn't making a lot of money.
It's half the price per license, and it didn't increase PC sales. So yes you can say that.
100m app downloads includes free apps, the number is worthless without the breakdown into paid apps or revenue figures.
Yes. This is all bad news.
Unquestionably. Windows 8 is falling behind Vista in the same time frame (last I checked)