I've been using Windows 8 now since August last year and must say I love it. There was a bit of a learning curve for me initially (although I was on a pre-release version so there wasn't a lot of help/support available) but once you get used to the new paradigm of Windows 8 you don't look back. Wendy captured the main official "selling points" neatly above but here's my experience: Things I like in particular - it's way faster, I haven't had a single crash (very stable) and my IT team tells me it's much more secure. The removal of the "start" button has caused some controversy which I find amusing once you realise you can hit the windows key and type the first letter of any application on your computer and it's right there - way faster than navigating the old start menu. The live tiles are awesome. I have now converted to a Surface tablet and Windows 8 Phone (Nokia Lumia 920) all of which share the same live tile concept and I would struggle to go back. Seeing your information presented together in automatically updating, scrolling tiles all in one place is brilliant - whether it's email, calendar, CRM or even News, Facebook, LinkedIn and Twitter feeds you can see them all again the same way on all your Windows 8 devices. There's also integration between all of these devices via your Microsoft ID so your bookmarks, email settings, etc are all seamlessly available and in sync regardless of the device you happen to have. Add Skydrive to the mix and you have the only real end-to-end cloud platform that works on all your devices anywhere anytime. I travel a lot and am on the road seeing clients so not having to worry about what to take and how to access my information is a big bonus. OneNote also works via Skydrive across all three of my devices so even if I'm driving I can dictate a note OneNote on my phone and it'll be immediately available on my Windows 8 laptop or Surface. The only thing I'd change now is I want to upgrade my laptop to a touch screen. Windows 8 works just fine using keyboard and mouse which is how I work most of the day, but once you've experienced the operating system on a tablet you really do want to touch the screen all the time and it's a neat way to interact with applications designed for Windows 8. Hope that helps?

A timely article that adds to the answers here - http://www.arnnet.com.au/article/445537/opinion_10_reasons_why_windows_8_makes_sense_business/?fp=4&fpid=390

Looks to me like there are not many Windows 8 users around! If you are a windows 8 user speak up :)

I haven't used Windows 8 myself but I thought I'd get the ball rolling while we wait for more Windows 8 users to surface - looks to me like we are all using our usual operating system - mine being Mac OSX.

PC Mag did a review and came up with this reasons:

 Faster startup

 A whole new world of apps