I also run/have run all of these and I do disagree, Windows 8 is a really good OS with a few poor UI choices, but I actually use computers to do real stuff where the UI is quite far down on the list of things that need to work
Oh i use computers for real work. And the metro UI gets in the way. And i'm not just talking about the lack of start menu - there are far more serious problems.
"a few poor UI choices" is putting it mildly.
For the average end user, the UI clash between desktop and metro requires constantly switching between which way things work.
The business desktop will not be free of desktop apps for a decade or more - so forcing users to deal with a touch UI on the desktop platform is going to be pain for a long time.
In metro itself, there are severe regressions when it comes to getting actual work done. Try, for example to perform a search across all document types for a particular search term. E.g., i want to find mention of "wireless project" across e-mails, visio files, word documents, pdfs, etc in a single search.
Windows 7 can do this. Windows Vista can do this. OS X (spotlight) can do this. iOS can do this. Windows 8 can not do this. Oh sure, you can drop to the desktop open an explorer window and type a win7 style search query in, except that it can't find content in metro apps. Or you can search each and every metro file type individually with multiple searches, from within metro. But that doesn't know about desktop apps, and you need to do the searches individually for every document type. It also doesn't seem to know about date ranges.
There is no option to run multiple Metro apps in Windows, only full screen or a sliver of the screen in split screen mode. This is not good enough.
To do multiple windows at the same time (say, to read a PDF document to follow instructions, or compare to another document) you need to drop to the classic desktop. Which means doing such tasks will never be moved to metro until this is fixed.
Which means the desktop is not going to go away, so we're going to be stuck switching from one UI to the other for the foreseeable future, unless microsoft make extreme changes to the metro UI design.
If we're having to drop to the desktop constantly, why bother with the metro UI on the desktop at all?
The only thing Windows 8 really has going for it that anyone cares about is updated powershell cmdlets, improved boot time (i reboot once a month, and it takes Win7 11 seconds including BIOS post to boot from SSD) and supposedly increased security (remains to be seen).
The trade-off is addition of a useless-for-the-desktop UI (seriously, i can't even have 2 terminal windows side by side in the new UI?), and a large amount of compatibility testing and application compatibility remediation before any corp wants to roll it out. It's not worth it.
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Deskbound workers were already well catered for. Microsoft aren't targeting any users at all, they are targeting the iPad by competing on features instead of any real world usage scenarios.
"it's got a keyboard, it's got a stand, it's got a pen and a 'real os' AND a tablet OS!" Who on earth wants to use all those things together?
So much this.
The surface is a feature tick box, designed by committee device.
It has no focus, and excels at NOTHING, because it tries to be everything and spreads itself too thin.