My Windows 8 laptop got here Tuesday.  Been playing with it a few days and this is an impromptu review.
I originally ordered a 
Lenovo Ideapad U300S based on the good reviews and the instant $600 rebate on the website.  The shipping date got pushed back a week.  Then a week later I came home to a voicemail message asking to call Lenovo to complete my order.  Then check my email and found that the order had been canceled per my request.  

   So ended up getting the 
HP Spectre XT, which was my 2nd choice.  My original plan had been to get a Win 7 laptop and just put Linux on it, but I figured I might as well go with Win 8 and give it a shot.  Mrs. SB has a Macbook that she's been using for the last 6 months or so and she tested it out really quick to compare.  She said the touchpad on it was great and so was the keyboard, just like her MB.  The original reason she went with the MB was because of the bad reviews other laptops were getting at the time in regards to touchpads and keyboards.  If something like this had been out at the time, she may have gone that way instead.  Also did a quick boot and shutdown test side by side and the HP is way faster than the MB at both.  Anyway, this is about the OS, not the hardware.
To summarize my initial impressions, I think this OS would be fantastic on a tablet or laptop with a touch screen. It's definitely designed to be used that way in "app" mode.  I'm not very good with using modern touchpads, so there's a learning curve.  I think I'm getting the hang of it, and how Windows 8 flows.  Nothing about it seems any less intuitive than an Android tablet. It comes with Security Essentials by default, so no need for any additional AV, but this came with Norton anyway which I promptly uninstalled.  If you use a lot of Google apps like Chrome, Drive or Reader, they are in the App Store. 
The Google reader app is terrible.  The reviews on it are almost universally negative. Everything else I had to download and install by hand.  No issues in getting any of them to run so far.  No crashes, slowness or bugs so far. Using it in desktop mode is similar to Windows 7 minus the start menu. Based on the last 2 days, I don't think I'd be in the market for a Surface.  I need apps to get "real work" done, and most of the ones I use on a day to day basis aren't in the app store.  I guess I could find similar replacements, but I want to use what I'm used to using.
I bought a 
USB docking station to go with it and my plan is to use this at work as a replacement for the desktop I have now.  If it holds up, I'll likely recommend to my director that we don't upgrade any workstations/laptops to Win8, but go forward with Win8 on any tablets/convertibles that we purchase.  I don't see any use for Windows 8 RT in the enterprise.