Well, this is that kind of things that could be seen as innovative, and we could have many things to talk positively about (actually we do)… but they really do it the *wrong* way, and so you really think they are not serious. And so, the negative points smash the good ones.
I’m always looking at the Operating Systems new features, as I really don’t know how the administrators handle in these days, some problems like the simple fsck downtime… or the big one: corruption and data loss.
Almost ten years ago, I do remember when we did swtich from extX filesystem on Linux to XFS. Performance, fast on recovery from server crash, and many other features. A filesystem that really helped us to solve many issues. No way to have email workload for example, running on a filesystem that did need fsck, right? It’s insane…
So, I’m looking really close to the new features of Windows 8, and yesterday I was reading this post. And as it was the first good techincal article I found about the underlying design and features of the new filesystem from Microsoft, the first thing I did was “Ctrl + F” to look up for ZFS. And I did find one, on the comments section…
Sorry, I think the ZFS developers are not worried about it, Jeff and Bill should not even know about this new filesystem, but I think Microsoft guys had the obligation to mention it. This new technology from SUN did change the storage Market, and the ZFS creators did talk about some inspiration on the NetApp filesystem and design. There is no shame in doing so…

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Why? Because is nice to show some respect.
Microsoft never did it, why they would do it now?

But Microsoft seems to still have the same approuch to make it seems like they did create the Personal Computer, graphical desktop, TCP/IP, and even the browser’s tabs. That’s a shame…

My first intent on this post was to write about some really good feautures this new filesystem seems to have implemented (and my concerns about the NTFS compatibility too). As my experience talking with some SUN/ZFS engineers, the VM was greatly impacted on the implementation of ZFS. And we do not need to talk about the ARC. But…
For now, I will pay some beers for my friends Windows system administrators (If they will have that life saving features, they need to celebrate). And later on, I will try to discuss here on my blog about the positive points ReFS and Storage Spaces will provide to Storage Market and Microsoft world, bringing to them some ZFS features… ;-)
peace