I was agreeing with you until you mentioned Windows 8. It seems like MS threw the road map away when it came to Windows 8. It's a complete f-up and no corporate is going to upgrade it. It's pretty clear they are going to skip it since the training and upgrade costs will be horrendous when most are only now moving to Windows 7 and 8 is simply just far too much of a departure from the standard paradigm.
The last part there just illustrates that "Metro" really isn't the core issue. It is not that it is a "tablet OS" it isn't. There are perhaps 7-8 new things the learn but it is perfectly usage with mouse and keyboard. It is the 7-8 things to learn that are the problem. Many companies won't be upgrading to 8 because they never did get rid of XP.
Windows 8 isn't really a failure if its growth rate matches that of Windows 7 over last 24 months. (yes even though Apple clowned them on Windows 7's rate. If the OS is going to be deployed for the next 5-6 years that isn't bad. Lion needs to get to 60-70% in a year because it is being retired in 2 years. At Window's 7 rates it would be in de-support before it got to that level. ) As long as Windows 7 polishes off XP in the corporate world and Windows 8 moves along in some corporate and alot of consumer desktops Microsoft will be just fine.
In 2-3 years, the number of corporations adopting will probably start a new growth curve as Windows 9 starts to queue up. Enterprise IT are typically just slow. They work on 4-6 year cycles to pretty much do anything with scale.
Even the journalists who are self-confessed MS fan boys are asking, "WTF".
LOL. It is actually in both groups self interest to fan the flames of discontent. The journalists because it is "news" ( unsuspecting user run over by Windows 8 because didn't read any manuals or doing any training. ). "Fan boys" since there is no expertise edge in being just as untrained as the users. ("we have to stick to this road because this is the one I know.")
The same kinds of folks who rolled on the floor in agony over OS X's LaunchPad. Or labeled Mac OS X 10.1 a downgrade to OS 9.