Windows 10 has a few neat features for Enterprise like some of the new management capabilities and more cloud integration. Although my role at work is more behind the scenes, server infrastructure, I do look forward to taking a look at being able to authenticate with Azure Active Directory or Windows Active Directory. Things like that.
I'm sure I'm not the only one. It makes sense for those that already have an investment in Microsoft infrastructure.
Home users, maybe they won't appreciate it so much, and that's fine, they can run what they like. That's their choice. I run a couple of Linux boxes, a Mac and a Chromebook in addition to Windows in my home, they all have their strengths and their weaknesses.
For work though, we're a Microsoft shop (long before I arrived) and that's fine by me. With adequate change control in place, regular maintenance and good infrastructure decisions, we have very little downtime. I expect performance and reliability to remain that way, or even improve as we deploy Windows 10 and its server equivalent in our environment after sufficient testing.