The latest update to Media Browser does offer Windows 8 compatibility. That was the deal breaker for me and I ended up reverting back to Windows 7. Now that it's compatible I'm trying to decide if/why to upgrade again. So far I haven't, but may some day if given a compelling reason.
I DO plan on getting a Microsoft Surface Pro and using it to access my media library wirelessly in a bedroom, but it obviously wouldn't be my primary HTPC.