Spending ten minutes on Windows 8 on my dad's computer gives me these impressions:
Ease of use of the Metro interface on desktop computers is significantly lower because simple operations such as opening and closing programs are now performed by touchscreen-friendly controls, which means that opening a program involves going through at least one fullscreen operation, and closing it, wait for it, requires you to click and hold the LMB on the very top edge of the screen, then drag it all the way down to the bottom edge. If Microsoft is trying to win people over on their Metro interface, that doesn't help.
While Metro is substantially less flashy than Aero w.r.t. fading and animations, it still has some embellishments in the way of sliding screen elements, and these are impossible to disable within its own (extremely limited) options menu.
Bafflingly, the single feature that I would actually have
liked about Windows 8 is not supported on desktop computers: Adjusting screen brightness.
Is this a fucking joke?
This guy wrote a software tool five years ago that dims your screen. It's 52 kb in size. To me, it just screams 'lazy', seeing that Microsoft haven't even bothered to implement a similar system for desktop computers, when it's already ubiquitous in phones, tablets and laptops.
Oh, and when I tried to run the aforementioned dimming tool, it was deemed unsafe and was blocked from running. The option to run it anyway only appeared after clicking 'more info'. [FOREBODE FOREBODE]